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Dyno requests?

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Posted by: marcusgunby---------------------

If anyone has any perticular bikes/tests they are interested in i will look up to see what i have, not much stuff before 2001 im afraid as thats when KP got the dyno.

So what do you want to know about?


Posted by: mylesc---------------------

How about 02 CR250 and 02 YZ250 dyno charts.

Thanks


Posted by: marcusgunby---------------------

Heres the closest i have
2001 YZ250 vs 2002 Cr250 both with a aftermarket pipe to make as equal as possible.
Red is the YZ250-as you can see it has less bottom and mid but more top end overrev, the 2002 CR250 looks a better engine than the 03, 04 which most people say has a soft bottom end power.


Posted by: Chili---------------------

03 RM125 which I'm pretty certain I asked earlier and you said you didn't have but I'll throw it out there. I'm also looking at an 01 and 02 RM250 and an 02 KX250 right now for a newer ride for me.


Posted by: jake949---------------------

04 yz125 and 04yz250


Posted by: marcusgunby---------------------

Chilli had another look no 03 rm125

closest i have is 2001 KX250 and 2001 RM250-the rm is in red and has good bottom and mid but lacks top-the KX has more power but only at the top.


Posted by: marcusgunby---------------------

Jake not got much for you here, heres a 2003 YZ125 thats hows bolt ons dont always work that well on all models, this has a pipe and vforce and doesnt match a std 2004 RM125, the YZ250f dyno was done with a knobbly tyre and so cannot be used a benchmark-however i did post a good dyno chart of the 2 strokes vs 4 strokes recently(cant remember the name of the thread) and the 2004s will be almost the same as those-they vary only a little year to year no matter what the mags say.


Posted by: bizzow---------------------

How about 200sx and RMZ/KXF?


Posted by: KAY DEE EXER---------------------

What about KDX figures?


Posted by: marcusgunby---------------------

Bizzow and Kay Dee, sorry nothing at all, the 200sx is a rare beast that has a nice engine that few feel the need to tune it , we whould have a RMZ soon but its waiting for a FMF powerbomb pipe to come in, before its worth dynoing.The KDX is a bike with a wealth of knowledge on tuning and few put them on the dyno.There was some KDX dynos in the KDX forum a while back.


Posted by: cujet---------------------

I am always interested in off road bikes such as the KTM 300 and 380EXC. Also how about a KTM 200EXC?

THX

Chris


Posted by: yzrulz---------------------

How about an 02 YZ125 or 02 YZ144?


Posted by: marcusgunby---------------------

Chris not really any off rod stuff-the guys dont generally want to pay to have the tuning done-its mainly british championship mx riders, the work is done for.

yzrulz heres a good one of a 2002 YZ125
it shows std vs a vfrorce and aftermarket pipe-a good gain on the 02 unlike the 03.


Posted by: marcusgunby---------------------

Chris i have found something for you-a 550cc Husaberg-its a total beast-std it makes 47hp at the rear wheel at 73mph!!! KP refused to tune it as it would just loose its lovely wide power and make it peaky.


Posted by: DEX---------------------

What about some 85cc dynos?
Or any four stroke 250 or two stroke 125 dynos.
For some reason I cant see any of the other dynos it must be cause Im free user maybe post links?


Posted by: marcusgunby---------------------

Dex I have some 85cc dynos(CRs and KTMs) -dont have any 4 stroke 250 dynos that didnt have a knobbly tyre.I have lots of 125 dynos-you need to say which model and year you want.You need to be a subscriber to view them-i dont have the time to post them all to the web site-sorry.


Posted by: marcusgunby---------------------

See how the curve is the same but its just 5hp less.


Posted by: al_ski---------------------

These dyno posts are great, I've come to this site looking for info on my Husky wr 250, 2000 vintage, any dyno charts? Mines got a hot up front pipe but no other work done. A standard model dyno would be a good guide. Thanks.


Posted by: marcusgunby---------------------

Chris i have found some Husky wr360 stuff for you-will post this and the WR250 2002 tomorrow.


Posted by: Vic---------------------

Quote:
Originally Posted by marcusgunby
See how the curve is the same but its just 5hp less.


The four banger has a bit more over-rev.



Posted by: cujet---------------------

No dirtbikes with 100HP? Darn

It would be interesting to see the stock Husky 360 compared to mine. I have far more port time area on my old beast, and all the other required mods to achieve 50+ RWHP. Too bad the 1994 Husky chassis is 1985 tech.

Chris


Posted by: marcusgunby---------------------

chris the most powerful so far has been the CR450 gp bike of paul coopers, it has about 57rwhp.Sorry but not even close to your desired 100hp

the wr 360 shows a pipe shoot out, crd vs fmf vs fmf shortened.

rgw wr250 shows a std vs tuned-the tuned is a total beast -50hp-i dont think the rider really wanted that much power for enduros???


Posted by: bclapham---------------------

you know lad, the whole world is waiting to see what type of power a 04rm144 will make!


Posted by: FFRacing11x---------------------

I see the charts are shown with a DIN correction factor. DIN will show about 2 rwhp more than SAE on a 450. We are achieving 64rwhp with the CRF and 60rwhp(both SAE)with the YZF.


Posted by: FFRacing11x---------------------

Yamaha YZ450F
Dyno Run


Posted by: marcusgunby---------------------

FFracing you hit upon some points i would like to answer, the dyno KP uses is properly calibrated, however it tends to read lower than the norm for the dynojet for example in the US, so we work in din rather than sae to make the results more comparable, it doesnt make much difference as its the gain people should look at, but most just see the peak numbers.

Can you elaborate more on the runs? seems strange the yz is 4hp down on the cr when its got a 5 valve head???

I assume you are going for more peak and top end power for the dtx courses?? would that engine work ok in mx??


Posted by: al_ski---------------------

Hi Marcus, thanks for the Husky wr250 dyno post, do all standard wr250s have that double peak of power at top end? Thats strange, do you think aftermarket front pipes will remove this? Im sorry but i cant remeber the make of my pipe (**** memory) but it did come from the husky importer in UK and was told its pretty good. Is it likely my bike with no other engine mods will still have this odd double peak?


Posted by: FFRacing11x---------------------

Quote:
Originally Posted by marcusgunby
Can you elaborate more on the runs? seems strange the yz is 4hp down on the cr when its got a 5 valve head???

I assume you are going for more peak and top end power for the dtx courses?? would that engine work ok in mx??


Marcus, as you know the stock 450 can be a handful on an MX track for the average rider, but the motors we have built for DT have worked pretty well for some experts that are running them.
The low and midlift flow of the 5 valve head can match the CRFs numbers, but it is the high lift flow that I believe is holding us back on the peak numbers.
Although my YZ does not match the CRF's peak numbers, it has a very good power spread that actually makes it pretty easy to ride. On some of the half miles and miles, where the CRs shift for the corners, my rider can one gear the Yamaha.
One of the most notable gains is in the over rev. Notice how little it drops off between Peak and the limiter?


Posted by: DEX---------------------

Quote:
Originally Posted by marcusgunby
Dex I have some 85cc dynos.


I would be interested in seeing whatever you got for 80 and 85cc dynos. Anything from 2000 to 2004 would be relevant.
No Kx or RM or YZ 80 or 85? Anything you got would be great.
I can see the dynos now.


Posted by: FFRacing11x---------------------

If Marcus doesn't mind me jumping in here, I have many CR and KX85 dyno charts in different mod stages I could post. Tdub


Posted by: marcusgunby---------------------

FFracing jump in by all means-its great to have more input


Posted by: marcusgunby---------------------

Alski alot of 250s have that double peak-its not unusual. I cant say if the pipe will remove it as the engines shown had cylidner work as well.The pipe you have could be the 2C pipe as the importers sold alot.


Posted by: marcusgunby---------------------

I actually have loads of 85s-im surprised how many
Heres some 2004s YZ vs KTM vs CR the yz is blue, ktm is red and cr is green.


Posted by: Vic---------------------

Where is the RM?


Posted by: 147leeman---------------------

Have any recent KTM 125's 03-04? Thanks for the others.


Posted by: marcusgunby---------------------

Heres a good one imo
all runs with the same make pipe
Green is 2004 RM125
Blue 2003 KTM 125 with a ICAT fitted.
Red KTM without ICAt fitted,the ICAT looses big time bottom end power and gains a tiny bit of top and rev, the KTM engine has major bottom end power -the most on the dyno for a 125, BUT it revs low-a peak of 10400rpm is very low for a 125 and i will have to be shortshifted to work.The 2004 RM engine is a copy of the KTM engine but it peak later, has less bottom and yet uses a smaller carb-38mm vs 39mm on the KTM.It seems even though suzuki copied the KTM they didnt find all its secrets.


Posted by: al_ski---------------------

Thanks for the reply Marcus, the dyno graph of the husky 250 you posted for me has made me really curious now. I looked at the other 250 graphs you've posted and they too have a dip over the top revs range. This seams to be over a 1000 rpm or so, the Husky's seema alot wider but the graph you posted for the husky had the bottom axis in MPH so I cannot compare the graphs. Do you have a graph for this bike with RPM axis? If so it would help me in the comparisons of these bikes and to weather I want to go down the road of more tuning. Thanks. Al.


Posted by: JB200---------------------

I would really like to see dyno results for 01 Kx125 vs 04 model 125's(all the brands or what ever you have). Also, 01 KX125 with E.Gorr 134 kit vs other 01 models with same kit and similar bolt on mods.I unfortunately have not really ridden any thing other than my 01 Kx125. Just curious to see how it stacks up.


Posted by: marcusgunby---------------------

alski the husky is wider for the dip but when i convert to rpm it goes funny-it says max power is at 4000rpm-the runs must have been corrupted somehow, you really shouldnt worry about the dips, with a pipe its probably alot less and also most people change up gears when they hit the first peak.

JB nothing for you im afraid, on the KXs i have a 2002 kX125 dyno but with a knobbly tire(25 hp max)and a 2003 thats good but only in the speed range-no rpm readings.

We dont really have big bores much here so i have very little like that.What i can tell you is the 2001 KX wasnt a good year-none were after about 96 till 03.They have a very narrow powerband is the main problem.


Posted by: marcusgunby---------------------

heres a 2004 wr250-look no dip on the blue std line this is the restricted version they now sell.All 25hp of rip snorting power


Posted by: KawieKX125---------------------

How about a 154 2 stroke stroker....any brand.


Posted by: elf---------------------

Quote:
Originally Posted by KawieKX125
How about a 154 2 stroke stroker....any brand.



I'd like to see a 155 too.I wonder if E.G. dynoed his 155 rm?


Posted by: kdxtodd---------------------

how about a 500 2-stroker. wait the highest was that crf so i suspect you don't have any 500s


Posted by: marcusgunby---------------------

Sorry no big bores, only a Cr133 i put up a while ago, and no 500s either-hardly any sold here these days.


Posted by: 147leeman---------------------

Marcus, on that 2003 KTM125 graph you posted...do you remember if that had stock pipe and silencer fitted? It seems low compared to many other graphs I've seen of late for 03 125 SX's. I've heard that bike reached the 35hp mark with doma pipe and silencer with different jetting...any 04 graphs?


Posted by: marcusgunby---------------------

That has a 2C pipe on like the RM has, as i was saying before the US dynos seem to read 2-3hp higher even when we use din instead of sae to try to equal it out.No 04 KTMs sorry.


Posted by: marcusgunby---------------------

heres one for vic its a 2002 RM80 std vs modified, the modified bike would put a 03 CR125 to shame considering how little they weigh


Posted by: DEX---------------------

What was done to that RM to get power like that?
Would my 2001 KX 85 with its Bills exhaust and porting for mid to high set up for 50 50 blend of Sunoco 114 and premium pump be anything close to that?


Posted by: Rcannon---------------------

Marcus, how about one of those old Hodaka's I rode when I was a kid. You have posted darn near everything else.

Just my way of saying thanks for the info! I have enjoyed looking at the charts. More of anything!

I would love to see a 97 or 98 yz 250 if you ever run across one.


Posted by: Y2Z---------------------

marcus, what aftermarket pipe were you using with the 02 yz 125?


Posted by: Vic---------------------

Thanks, Marcus. Are those some nice lookin' curves, or what?!




Posted by: cujet---------------------

Marcus, I think the post about "Something better for alski" is a WR450. Otherwise, a 45HP 250cc 4 stroke Yamaha engine is the worlds best kept secret.

Chris


Posted by: marcusgunby---------------------

I think its a 2004 Husky wr 250 2 stroke


Posted by: bclapham---------------------

Macrus: have you got one of Steves yz144's compared with stock??? someone wants to know


Posted by: marcusgunby---------------------

bruce i dont have any of steves since i reformatted -sorry dude.


Posted by: bclapham---------------------

email steve then, he never replies to me!


Posted by: zio---------------------

Marcus- I can barely read the chart for the Husky WR250- does the modded version read 2C pipe & vforce w/ 10mm spacer?

I'd like to hear some folks talk about that 20 hp difference just with a pipe & reed cage. I don't care about peak numbers, just the difference, & overall curve change. Seat of the pants would be preferred, but dyno charts are the next best thing for us posers.


Posted by: marcusgunby---------------------

Zio yes it does, however as i said the std bike is resticted and so a pipe makes a massive difference.Previous std wrs had alot more power.


Posted by: Faded---------------------

Any for a '00 or '01 CR125? Thanks for sharing Marcus.


Posted by: marcusgunby---------------------

Faded i have loads of 01 cr125 dynos-including a cr133 01 let me know what you want to see as i need more info to give you something you want to see, i have pipes tests, v forces i think.


Posted by: SamMiDD---------------------

Hi Marcus i am from England like you i see you are helped out by Prestwood i am currently running a 2c silencer on my Rm125 04 but i just rang him up the other day to order a pipe (rest of the bike is standard motor wise) he seems a nice chap....just out of interest i saw your Rm125's dyno chart and was wondering if you have a specially made pipe to go with teh engine work or if it was off the shelf pipe like i will be geting off Karl next week. I am freinds with the ARW suzuki lot and Scott Collumb's bike has a special pipe i know that just wondered if yours does. Also i hear Karl has played with the powervalve which i am guessing he has done with yours what did this do and how much roughly would it cost off karl to get it done? I'm a Senior 125 bsma rider from Leicestershire btw i see your a amca expert so you must be quite handy!!! what group do you ride in where are you from?


Posted by: Faded---------------------

Marcus,

On the CR125 I'm just interested in stock, or something close and one modified for top end with a decent power spread. Thank you.


Posted by: marcusgunby---------------------

SammMidd shoot me a e mail at moggy105@nildram.co.uk im closer to you than you probably think the pipe is a off the shelf 2c pipe.


Posted by: marcusgunby---------------------

faded you are asking the impossible of me a 2001 cr125 with good top end and a good spread of power LOL doesnt exist.Even team honda couldnt find that

this shows std vs a 38mm carb, v force and fmf sst pipe.Its a good engine for a 01 but very average for a 125.


Posted by: Faded---------------------

Marcus,

It's good enough for me! Thanks, I appreciate it. Have any others that are top-end screams without regard to the power spread? If not, don't worry about it, this is plenty! Thanks again.


Posted by: marcusgunby---------------------

Ohh yes here it comes and hold on tight baby this engine is a total beast-blows away the 04rm125 as it should
Its a 2001cr125 with eric gorr 2000 cr133 cylinder that has been decked a small amount-its uses a v force , 38mm carb, wulf ignition, pipe etc etc.

it has 38.3 hp and not bad bottom end power.This was the best ever 2001 cr125 but then its not really a 125


Posted by: SamMiDD---------------------

You have mail buddy

Whats with all the 125 big bores anyway? seems a little pointless to me?


Posted by: Rich Rohrich---------------------

Quote:
Originally Posted by SamMiDD
You have mail buddy

Whats with all the 125 big bores anyway? seems a little pointless to me?



It's clear you never RIDDEN one.


Posted by: Rcannon---------------------

125 weight with near 250 power........ Pointless???? Whatever you say. Sounds like the perfect bike to me.


Posted by: bclapham---------------------

Quote:
Originally Posted by Rich Rohrich
It's clear you never RIDDEN one.


easy Rich! to be fair, the 04 rm125 MG+KP have built isnt far off my 02 rm144, that bike is fast!!

ii wonder if i will be able to tell the difference when mine gets the long rod conversion???


Posted by: elf---------------------

Quote:
Originally Posted by SamMiDD

Whats with all the 125 big bores anyway? seems a little pointless to me?



125 big bores are a blast!!!


Posted by: marcusgunby---------------------

Come on guys lets not be too harsh on sam, over here the big bores are illegal in all classes and we dont generally have much woods riding etc so they dont have much of a purpose-i think thats what he was getting at.


Posted by: elf---------------------

Quote:
Originally Posted by marcusgunby
Come on guys lets not be too harsh on sam, over here the big bores are illegal in all classes and we dont generally have much woods riding etc so they dont have much of a purpose-i think thats what he was getting at.


No harshness meant, just saying there fun.
Marcus where did you ride yours when you had one? If there illegal in all classes.


Posted by: marcusgunby---------------------

LOL i raced a CR133 and a KX133-i can honestly say it gave me no advantage but it was fun


Posted by: al_ski---------------------

Cheers Marcus for the latest Husky posts! Have been away for long weekend and only just had a chance to read them. Must say '04 wr250 looks like a stonger motor, than my '02. Not sure I can justify expense to get one though. Maybe a little tuning will be cheaper? Will look for threads on Husky tuning now. Any suggestions for work on the motor?


Posted by: SamMiDD---------------------

Your right in saying i have never ridden one....this is because they are illegal here and there are no classes for them i supose you could race a big bore in the 250 class tho.

I have ridden a 04 SXS200 which i supose is the closest thing to a bored 125 etc that i have rode and i admit it was dam fast but i could go a lot faster on my 125 :D

thanks for sticking up for me Marcus!


Posted by: Rich Rohrich---------------------

Quote:
Originally Posted by elf
No harshness meant, just saying there fun.


That was my point as well, you Brit guys are too damn touchy. I'm sorry you guys can't figure out how to get your beer cold, but don't take it out on us.

Once you ride one it's pretty easy to understand WHY people like big bore motors. They take the fun of 125 and make them even more fun. I guess I quit caring about MY lap times long ago. In much the same way I'm way faster on a 250F than my CRF450 but the 450 is way more FUN to ride for pretty much the same reasons.

I'm pretty certain all the sick mods I'll do to the CRF450 this year won't make me any faster, but I know for sure the FUN factor will go up, and that makes it all worthwhile.


Posted by: marcusgunby---------------------

alski the husly motor as far as i know hasnt changed much in the last few years so you could have anything from 40 to 50hp if you wanted-its all down to budget and how long you want your arms


Posted by: SamMiDD---------------------

why are we touchy lol

I didn't take no offence at all to it!!!

U americans take things to seriously :P.....stereotyping right back at u

As for the 250F 450 thing i agree totally even the expert classes here other than the front few the 125 experts are running way faster than the open class.


Posted by: yamayz125---------------------

Do you got Yamaha YZ125 2001?


Posted by: mafrif---------------------

Do you have any 00 Cr 250 or close
And any 01 yz 426 or close.

My buddy and i are exactly the same drag racing, be interesting to see the dynos.

Thank You

Chad


Posted by: marcusgunby---------------------

This is a good dyno-a lovely engine the 01-look at the line-perfectly straight-hard to improve on really, its got good bottom 15hp at 7K is as good as most 125s get.


Posted by: marcusgunby---------------------

mafrif i dont have anything from 2000 as thats before the dyno was installed,and i have nothing on the 4 strokes apart from crs, however i have found something really interesting, this is a full factory CR from 2001, we all assume the factory bikes put out massive hp0i keep hearing 40 hp from a 125 and 250f -this isnt reality, the ones that do have that power are slower on the tracks than one with 36hp as the power bands are so narrow.

Look at this dyno 46hp is the peak for the 2 stroke 250, and the other graph shows the special start mode built into the ignition module-it was activated by a switch on the bars(looked like a light switch from a road bike) see how it backs off the power alot-this is for better hook up.

On your drag races the 2 bikes may well be similar-the 2 stroke will rev out fast and its shorter gearing lets it keep up, but out of corners the 426 will have way more power.


Posted by: Taliesin---------------------

Marcus has KP done any work or Dynoed a TC450? I was disappointed that Paul Cooper turned down the offer of going back to Husky.Also any Husky CR 125 04 dyno charts.I read somewhere Husky have done some more developement on the cylinder & improved power spread a lot?


Posted by: marcusgunby---------------------

Taliesin heres what you wanted-husky stuff i have

i pu them all on one dyno, i think you can guess which is which

if they have made the std one better its not much im afraid-30hp with a bad spread isnt going to win any dyno shoot outs, i dont think any other 04 is as bad.


Posted by: marcusgunby---------------------

Heres a 2002 husky 125 vs 2004-yes the 04 is better but its still terrible lol.Shame as the engine can be tuned to run as good or better than most.


Posted by: Taliesin---------------------

Cheers for them Marcus as you say the motor has great potential.As I remmeber Sword had a great season in 01 in the GP's.Any Dyno runs of his works bike? Pity old Puzar wasn't more motivated in 2003 I'm sure if he had pulled his finger out he could have won the 03 title for Husky.


Posted by: marcusgunby---------------------

Any Dyno runs of his works bike?

yes hundreds i will get soem together tomorrow.


Posted by: marcusgunby---------------------




Posted by: Taliesin---------------------

Damn that more like it!! No wonder Sword grabbed so many the holeshots in the Gp's.So there is another 9 ponies there somewhere in the Husky mill!!!


Posted by: marcusgunby---------------------

Not relaible ones im afraid-this engine didnt always finish the race
thats what i try to say on the 40hp super rockets people talk of, to get it reliable it was backed down to about 36hp.


Posted by: 1966mustang---------------------

How bout the 03 rm 85? thanks


Posted by: marcusgunby---------------------

Sorry no 03 rm85, only a 04 and that has a knobbly tire and so the results dont compare well.


Posted by: mxpaint04---------------------

do you have any 03 or 04 cr125 (honda) charts?


Posted by: marcusgunby---------------------

i do but they dont show much-it still a slow engine with little power, the 05 is the best for bottom end but has a average top end-i think i put up a 05 vs a 01(very slow) and the 05 was almost the same apart from a little more bottom.


Posted by: mxpaint04---------------------

how much of an improvement is the 04 vs the 01? but it sounds like i would be better off with another 125 since you said and all the shootouts i have seen say it is a weak engine ... in terms of engine performance (lowend/midrange) what bikes might u reccomend i take a look at...any thoughts as far as 03's and 04's go?


Posted by: the trail rider---------------------

how about a stock 02 kdx220r vs one with a pipe and reeds


Posted by: bikepilot---------------------

I have a 01CR250R with both stock and FMF (Fatty, standard powercore) exhaust system. I would love to see any dyno charts on this bike, especially a comparison of the stock to the FMF exhaust systems. (BTW I did see the factory 01CR250 chart you posted a couple of pages back).

Thanks,


Posted by: marcusgunby---------------------

For engine power most 125s are good apart from the CR-i would say the YZ and RM are good the KX is a little behind as its power is more narrow like the CR, the KTM has the most power std but it handles bad IMO-a all round package i think the YZ and the RM.

No KDXs im afraid -people here dont tend to spend money to dyno them.

I have a std cr250 2001, this shows how a engine can loosen up-alot of the dynos are on very new bikes and the engines free up while you are testing them.


Posted by: bikepilot---------------------

Thanks for posting that chart

Do you think that dip around 40mph is jetting releated? Any recomended mods? My bike is stock save FMF exhaust (I also have the stock stuff, which has never been used).

The bike also came with a new stock head that has been cut down .020" for more compression. Any thoughts on how this would affect power? Would it be likely to require race gas?

thanks,

josh


Posted by: marcusgunby---------------------

The dip is common on 250s, to be honest i dont know why they do it , but as they are tuned it tends to go away, if you shave the head on a cr i would run race fuel or at least a 50/50 mix, more compression tends to make it hit harder and rev a little less.


Posted by: KX02---------------------

Speaking of 250's I looked through your posts but I don't think I saw a 2005 KX250. Have you run any of these?


Posted by: marcusgunby---------------------

No 05 kx 250 but heres a interesting one, its a kx 250 with a pipe and also comparing a boyesen reed block, the boyesen actually lost power apart from a little overrev-all that glitters is not gold


Posted by: buttnut---------------------

2003 kx 125?


Posted by: marcusgunby---------------------

2003 kx 125 std vs aftermarket pipe.


Posted by: bikepilot---------------------

Quote:
Originally Posted by marcusgunby
The dip is common on 250s, to be honest i dont know why they do it , but as they are tuned it tends to go away, if you shave the head on a cr i would run race fuel or at least a 50/50 mix, more compression tends to make it hit harder and rev a little less.

Thanks for the info, I think I'll leave the high comp head in the box for now and stick with the stock one. I might try it out just for kicks, but I think I would perfer the smoother hit and more over rev so I'm probably better off with stock compression.

Thanks,


Posted by: buttnut---------------------

How much more power would there be on a 2003 KX 125 with an aftermarket pipe + silencer than just stock. Thanks for that info


Posted by: akrider---------------------

05 ktm 250sxf and 05 yz250f

thanx


Posted by: marcusgunby---------------------

Quote:
Originally Posted by buttnut
How much more power would there be on a 2003 KX 125 with an aftermarket pipe + silencer than just stock. Thanks for that info


that is a full pipe
marcus.


Posted by: marcusgunby---------------------

No 05 ktms or 05 yzf sorry.


Posted by: mxpaint04---------------------

how bout 03 or 04 yz and rm 125's


Posted by: robwbright---------------------

Hi:

Wondering if you have any 02 RM 125 Dynos. I would like to see stock, 134 and 144 if you have any of them.

I have stock motor with Bill's Pipe and Silencer. I want to go with 134 or 144 and port/polish.

Think I can get 37 HP +/- with 134 and port job?

Thanks

Rob


Posted by: marcusgunby---------------------

I put up some cr133 dynos(only bb kit i have with dynos) that had 38hp+ so its very possible-will look into the others dynos later-also do a search for dynos and my name as i posted alot in other threads -i think i did a 04 125 shootout of dynos.


Posted by: mxpaint04---------------------

thx and u are doing the dirtbike community a big service... keep up the good work


Posted by: KAWA200'sRule---------------------

Ever dynoed a tm125? Im more than likely going to pick up one or two once my bike sells. Ive heard they have just about 37 hp stock.


Posted by: marcusgunby---------------------

No tm other than a 400 4 stroke i think, i doubt a tm has 37hp std, ive never seen a 125 with more than 33hp std including the all powerfull ktms.I suppose it depends alot on type of dyno, some show 38hp for a std 125 and upto 42 for a tuned one, some show as low as 28hp for a std 125, you can only really compare bikes tested on the same dyno, the numbers are really not that important, also a older type dynojet really wont work that well with a 4 stroke, they seem to generate so much heat etc the numbers can change alot in only a few hours.


Posted by: vetyz47---------------------

What would your educated opinion be about porting and a 265 or 285 kit for a 05 yz 250? What is the real difference in hp with, say the 05 crf 450? Would I be better off with just the eric-gorr porting or would you suggest a big bore kit to level the 'up hill start ability' of the 450f's? Thank you in advance for your advise......

PS....and maybe you could even tell us why the ama screwed us with these damn 450's......can we resize the displacement to 400 cc's?


Posted by: Brazilian Rider---------------------

Marcus,

I tried to find in this post the CRF250x and the WRF250x... do you have their figures? Do you also have torque numbers for this bikes?

Thank you very much

Cheers
BR


Posted by: marcusgunby---------------------

Quote:
Originally Posted by vetyz47
What would your educated opinion be about porting and a 265 or 285 kit for a 05 yz 250? What is the real difference in hp with, say the 05 crf 450? Would I be better off with just the eric-gorr porting or would you suggest a big bore kit to level the 'up hill start ability' of the 450f's? Thank you in advance for your advise......

PS....and maybe you could even tell us why the ama screwed us with these damn 450's......can we resize the displacement to 400 cc's?



if you want to race with 450 go as big as you can, good porting can add a few hp to a part of the powerband but you need more than that for a 450 eater.

as for the ama -dont just blame them the fim also did the same, they should downsize to at least 200 and 400, if i had to race a 200f i would seriously consider a 125 again.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by Brazilian Rider
Marcus,

I tried to find in this post the CRF250x and the WRF250x... do you have their figures? Do you also have torque numbers for this bikes?

Thank you very much

Cheers
BR


Sorry none for those models, i guess if you wanted more hp you would start with a mx version as a base?


Posted by: Brazilian Rider---------------------

Marcus,

I do not want tons of power as I am new to dirt bikes (just 1 year). I was asking specifically about this 2 bikes because they are on my wish list and it seems that Santa Klaus (myself) is going to give me one of this at the beginning of 2006 :-)

Thanks any way

BR


Posted by: yamayz125---------------------

Have you dynoed a Yamaha YZ125 2006?


Posted by: marcusgunby---------------------

LOL no 2006s yet, KP has ordered a new 250i dyno and it wont arrive till near x mas so no new dynos till then, what i can say is generally they rearly change much year to year, the media hype each new model, but on the dyno often they dont vary by as much as 1hp from last year, this is often true even with a brand new engine, the 05 didnt make very impressive dyno numbers but its a engine liked by many riders.

The best one was the 01vs 05 cr125, the 01 was a terrible engine, but against the 05cr it was only lacking a cuple of hp in bottom end power, once into the mid it matched a 05 easy, a 01-05 yz would beat a cr of the same year by a decent margin.


Posted by: Anthony M---------------------

First post here! Do you have any charts for a 2001 RM125?


Posted by: rm85---------------------

what about the rm80 or rm85????

thnkz


Posted by: DirtRyder03---------------------

What about a deristricted or restricted Honda xr650r?


Posted by: Rcannon---------------------

Marcus, how about a Hodaka 100 super rat. Any year will be fine.


Posted by: KDXman_88---------------------

Do yu have any dynos of a 2003 YZ250 laying around, modded or not it dosent really matter.


Posted by: kdxrider220---------------------

2005 kdx 220 please


Posted by: skipn8r---------------------

Great dyno posts . Do you have any '02-'04 CR250 dyno curves before and after EG Mo-Better porting?


Posted by: shortyw13---------------------

do you have a husky 125 00-04 on the dyno?


Posted by: imoto---------------------

What about an 05 CRF250, I'm hearing numbers all over the place. Most mags are claiming 32 - 32.5. I'm thinking it's really about 31. I'm also hearing rumors of 43-45HP motors by the factory MX teams and PC. You hear anything? We're getting 32.5 with mild intake port mods, CV4 valves (which BTW bump the compression from 12.5 tp 12.8:1, they didn't even know that, funny things you learn when you actually CC stuff), and stock everything else. Throw in an FMF megabomb with 14" or 17" 4.1 muffler and we get about 34 and 18.5ftlb. We're doing mods very incrementally to see exaclty what does what, and we bought a new DJ 200i, very cool tool. Interested to hear back, thanks!


Posted by: marcusgunby---------------------

sorry for the delay, i will look up all recent requests and post the dynos in the next few days.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by DirtRyder03
What about a deristricted or restricted Honda xr650r?

sorry no xr650 and no kdx 220 -very few of these bikes hit the dyno here.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by shortyw13
do you have a husky 125 00-04 on the dyno?

I put up a husky 125 dyno 01 vs 05 i think.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by rm85
what about the rm80 or rm85????

thnkz


pretty sure there is a rm80 or 85 dyno up already, get back to me if not.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by skipn8r
Great dyno posts . Do you have any '02-'04 CR250 dyno curves before and after EG Mo-Better porting?


No cr250s with eg porting im afraid.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by KDXman_88
Do yu have any dynos of a 2003 YZ250 laying around, modded or not it dosent really matter.


This is a good dyno, 2003 yz250 doma pipe vs fmf the fmf is blue, the fmf is alot better pipe.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by Anthony M
First post here! Do you have any charts for a 2001 RM125?

sorry no 2001 but i think there are 2002 and 2004 dynos up in the thread.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by imoto
What about an 05 CRF250, I'm hearing numbers all over the place. Most mags are claiming 32 - 32.5. I'm thinking it's really about 31. I'm also hearing rumors of 43-45HP motors by the factory MX teams and PC. You hear anything? We're getting 32.5 with mild intake port mods, CV4 valves (which BTW bump the compression from 12.5 tp 12.8:1, they didn't even know that, funny things you learn when you actually CC stuff), and stock everything else. Throw in an FMF megabomb with 14" or 17" 4.1 muffler and we get about 34 and 18.5ftlb. We're doing mods very incrementally to see exaclty what does what, and we bought a new DJ 200i, very cool tool. Interested to hear back, thanks!


Ive got all sorts of crf dynos but i dont trust them much to be honest, they vary from 28hp upto 33hp, this is for a std bike, the best is 33.3hp and 18.6lbft.It was a cold day and the same bike recorded much worse numbers only a few weeks later, it struggled to beat 31hp, like wise my 05rmz has had numbers as high as 32.5hp and low as 30hp.I think thats why kp wants the newer dyno, it gives more repeatable readings.

the crf does seem to resond well to mods, 35hp is very possible(from 31hp std) but the same goes for the rmz, KP hasnt seen a 250f crack more than 36hp on his dyno(reads lower than most US mag dynos).He has seen a dyno for a ktm250f with a fmf pipe on a 250i and it did have 41hp, the other 250f dynos with close to 40hp all had curves like a 125.

It seems to me 35hp(+4hp) is good for a modded 250f.

The 06s seem to have made gains from what i read, so i think 37hp is possible.


Posted by: cordic---------------------

I was just wondering if there was any charts out on the new 06's YZ250F, CRF250R, 250 SX-F. If not any on the 05's of the same bikes.


Posted by: marcusgunby---------------------

I think i put some 05 crf ones up already.If not get back to me i have loads, none on the others however, i would like to see a ktm one as they say it makes mega power but the one i rode didnt seem to make amazing power.


Posted by: BMWPower---------------------

how about a 2002 YZ250, thanks


Posted by: cordic---------------------

I am doing a comparative analysis on the 05 crf 2005R ,yz250F, and the 250-sx. Any dyno charts or other information that could be provided would be great.


Posted by: 2-strokes-4-life---------------------

was wondering if you would maybe have a chart for a 2001 cr125?


Posted by: marcusgunby---------------------

Quote:
Originally Posted by 2-strokes-4-life
was wondering if you would maybe have a chart for a 2001 cr125?

Im sure i put one up on the 2001-its really not something you want to see, its totally lacking in power.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by cordic
I am doing a comparative analysis on the 05 crf 2005R ,yz250F, and the 250-sx. Any dyno charts or other information that could be provided would be great.


the 05 crf is a reasonable engine but nothing amazing, its better than the yzf IMO, the yzf is similar with less bottom end.

when you say 250sx-you mean the ktm 250f or 2 stroke, if you mean the 250f -kp has dynoed some of the 06s and the ktm romps, 35.3hp vs 33hp for the crf.35hp is the second highest for a 250f on his dyno.With a pipe it is a really fast engine.The husky actually had 1hp more however.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by BMWPower
how about a 2002 YZ250, thanks


think i put one up-get back to me if not.


Posted by: cordic---------------------

Yes i did mean the KTM 250F, sorry for the confusion, if you have the graphs for the bikes could you send them or tell me where i could possibly find any. Thanks


Posted by: marcusgunby---------------------

sadly the yzf ones are all with a knobbly tyre and so cannot be compared with the crf, the ktm 06 dynos i dont have from kp yet, he goes away for over a month so its likely to be early 06 before i see them


Posted by: cordic---------------------

Do you have any for the 05's?


Posted by: marcusgunby---------------------

Quote:
Originally Posted by cordic
Do you have any for the 05's?

as you are so persistant i decided to dig up some interesting dynos, this one shows how much bikes can vary,these are all std 05 crf 250s the changes are a little due to different conditions(some were done on a warm day and others a cold day) however they do vary by this much depending on how loosened up the engine is, and other factors.

This shows you cannot compare dynos curves done on a different dyno, or even a done on the same dyno on a different day.

When tuning you only can compare numbers from that days curves, you cant look back to one done a few month before and really compare like with like.

for the record IMO the green one is far the most realistic, i was actually on the bike that recored 33hp and it wasnt a realistic number, after fitting a pipe and then removing it, the bike lost over 1hp-its just something that happens as the room warms through the day-ideally the room should have airconditioning and always be about (im guessing) 60oF.


Posted by: spank---------------------

Marcus,do you have something about cr 500 ('00-'02)?
Thanks


Posted by: marcusgunby---------------------

i have one cr500-the dyno was done in 2004 but i have no idea of the year of the bike, for interest i have showed a std 2004 cr450 as a comparison, its funny as many people do sx on a 450, but would never consider doing it on a cr500, yet in power output they are similar.


Posted by: oldfrt613---------------------

Trying to keep the 2-stroke alive !


Posted by: SpLiTFiRe---------------------

sorry read below


Posted by: SpLiTFiRe---------------------

Do you have anything showing a 05-06 kx250 stock vs mod or ANYTHING?


Posted by: spank---------------------

Thank you very much marcus


Posted by: BMWPower---------------------

Sorry Marcus, but I looked at all 16 pages of the thread and could not find one of a 02 YZ250
Thanks


Posted by: stimps---------------------

Any dynos of 2000-2006 YZ250 with different pipes. Be good to see what the likes of FMF,PC,DEP,Doma, etc really do too the power. And Different length silencers. Is the shorty boosting low end power a myth ?


Posted by: Masterphil---------------------

Look at the hit on that 500! If you could smooth out the power on that thing it would be a lazy riders dream!


Posted by: john stu---------------------

yea that would be great............hey wait a second "that IS great"


Posted by: marcusgunby---------------------

i will try to catch up on these , but im just really busy and it takes time to get all the charts.


Posted by: dombush---------------------

Marcus

Have you done any charts comparing reed blocks (v-force, Boyesen). It would be useful to know whether this aftermarket product is a gimmick or not.

Dominic


Posted by: marcusgunby---------------------

Quote:
Originally Posted by SpLiTFiRe
Do you have anything showing a 05-06 kx250 stock vs mod or ANYTHING?

sorry no 05 or 06 kx250s.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by oldfrt613
Trying to keep the 2-stroke alive !


no big bore 250s

heres a 05 cr250 vs a 04 cr450f-its no comparison really.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by BMWPower
Sorry Marcus, but I looked at all 16 pages of the thread and could not find one of a 02 YZ250
Thanks


sorry no 2002s.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by stimps
Any dynos of 2000-2006 YZ250 with different pipes. Be good to see what the likes of FMF,PC,DEP,Doma, etc really do too the power. And Different length silencers. Is the shorty boosting low end power a myth ?


Heres a 2005 yz 250, std pipe is green, blue is dep pipe and red is a 2C pipe, this is fairly typical, the std is a good compromise, the dep has gone for top end and the 2c targets bottom and mid.Alot of tuning is a trade of power.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by dombush
Marcus

Have you done any charts comparing reed blocks (v-force, Boyesen). It would be useful to know whether this aftermarket product is a gimmick or not.

Dominic


I did put up a dyno on a older thread comparing v forces to boyesen(it would take me ages to find it again), the boysen sucked but this was the older version, then again on some models the v force sucked as well, it often is model specific, just because a vforce works on a yz 125 doesnt mean it will on a cr125.


Posted by: skipn8r---------------------

Quote:
Originally Posted by marcusgunby
Heres a 2005 yz 250...

Is that representative of a good running '05 YZ250 at sea level? That's only a couple of more HP than the dyno curves I've seen for 250 4-strokes...

And what is a 2C pipe?


Posted by: marcusgunby---------------------

Quote:
Originally Posted by skipn8r
Is that representative of a good running '05 YZ250 at sea level? That's only a couple of more HP than the dyno curves I've seen for 250 4-strokes...

And what is a 2C pipe?


No its not representative of a good running yz-often bikes in for tuning are new or nearly new, a nearly new 250 will have power as low as 38ish hp, often after a few weeks running the same bike might make 43hp.

The comparison is valid but dont look at the actual hp scale on this graph.

A 2c pipe is a euro brand , the owner of the dyno made/designed them.


Posted by: ononewheel---------------------

Im getting my 01 RM125 in a month and I would love to see some dynos of it.

Stock and with different mods so I can see what is feasable for my new beast.

Please.

Oh yeah it has a full dep pipe already.


Posted by: stimps---------------------

Hi Marcus, Nearly bought a 2C pipe at the Coventry show on special offer(£80-). Money ended up on a PC304 silencer to replace the current shorty which sounds like a big bore strimmer.
Any dynos of stock system compared to a PC pipe on a YZ (currently on my 05)and what difference these shorty/long silencers make. I've still got a DEP and DOMA of my 2000 YZ but only the DEP felt like it did'nt lose to much bottom power. Might try the DEP on the 05 later just to compare. Cheers


Posted by: marcusgunby---------------------

Sorry to dissapoint but for the immediate future i cant put up any more dynos, commitmants mean im away from home for a while.


Posted by: Avena Quaker---------------------

Marcus, do you have any YZ/CR/KX/RM 144 dyno avaliable ?

Im interested in seeing one to compare with a 250F... do the pingers still have a chance ?


Posted by: marcusgunby---------------------

I dont have any 144s but steve125 has some somewhere, basically a fully tuned 144 has a little more peak hp(38-39HP) than a 250f but way less torque, for a good rider it can make a difference but for a average rider a 250f is way easier to go fast on


Posted by: david64---------------------

Marcus, do you have a dyno graph for the 2004 KTM 250sx? If so, do you also have any that show comparisons once modifications have been carried out, ie different pipes, V-force 2 v V-force 3 etc


Posted by: robwbright---------------------

Quote:
Originally Posted by Avena Quaker
Marcus, do you have any YZ/CR/KX/RM 144 dyno avaliable ?

Im interested in seeing one to compare with a 250F... do the pingers still have a chance ?


Check here:

http://www.dirtrider.net/forums3/showthread.php?t=89861

144 dyno. It's not Steve125's but still pretty impressive.

Rob


Posted by: TeamPyka---------------------

Does anyone have stock dyno of 01-03 125 cr? And there were couple of tuned 02 cr 125 dyno picture, but they are lost. I didn't find those.


Posted by: marcusgunby---------------------

im back at home now so if any one has any more, i still dont have the 06s but hope to in the next month.


Posted by: cookiemuncher---------------------

how about a 250 two stroke over layed agaist a 450 four stroke? Torque would be great to


Posted by: JMM---------------------

Are those hp numbers in dynos posted by marcus rwhp's or engine hp's?


Posted by: Avena Quaker---------------------

Marcus, Do you have any dynos of GasGas, TMs, Husabergs and those europeans not so common here ?
BTW, I went back and saw the CR 500 dyno.. that thing is a beast ! Do you remember if the engine has some kind of work in it, or is it bone stock ?

Also, I wanted to ask, why is that most of the graphs are power vs speed rather than power vs rpm ?


Posted by: Bryan F---------------------

How about 2004 KTM 125 sx?


Posted by: CamDayKX125(4)---------------------

what about a 00' kx 125 and/or vs. a 00' yz 125? thanks in advance.


Posted by: marcusgunby---------------------

Quote:
Originally Posted by JMM
Are those hp numbers in dynos posted by marcus rwhp's or engine hp's?


rwhp


Posted by: marcusgunby---------------------

Quote:
Originally Posted by Avena Quaker
Marcus, Do you have any dynos of GasGas, TMs, Husabergs and those europeans not so common here ?
BTW, I went back and saw the CR 500 dyno.. that thing is a beast ! Do you remember if the engine has some kind of work in it, or is it bone stock ?

Also, I wanted to ask, why is that most of the graphs are power vs speed rather than power vs rpm ?


I will look at all requests as soon as i can, its start of my season next week and also i have alot of suspension to do, the reason for no rpm, is the sensor wasnt hooked up, if its just a dyno run for interest then kp often doesnt hook up the sensor to save a little time, the cr 500 was std.

I think there is a husaberg dyno somewhere and i have loads of husky ones??


Posted by: wornknobby---------------------

say i was wondering, how far back can you go in years w/ your dynos? mid 90's, early 90's, maybe even late 80's??


Posted by: limitless---------------------

how about an 03 cr250 vs 03 crf450


Posted by: usmarine6282---------------------

how bout a 01kx250 vs a 04 cr250


Posted by: KDX200Kev---------------------

Do you have any dyno's on a 1996 Suzuki RMX 250 (Stock vs ported)?


Posted by: moto guy---------------------

how bout a 2006 honda CR85RE and a CR80RE.


Posted by: KDX200Kev---------------------

No more dyno info.



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