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Ultra high HP dirt bike

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

I would like to build a 2 stroke dirt bike with major HP, like 70+ at the rear wheel. One of the ideas I had was to use a 2 cylinder engine. Somthing like 800cc. Another thought was to make a big bore CR500 or KX500. I ride my bikes on the street from time to time so a 6 speed is a plus.

I am looking for sugestions. The big bore idea is probably possible, however vibration may be a problem.

Chris


Posted by: bwalker---------------------

A cr 500 should not have a problem reaching 80+ hp in street form. The bike may be a bit much for the dirt though.


Posted by: KiwiBird---------------------

I too have dreamed of this from time to time. My choices for engine included, ultimately, modified snow mobile, jet ski/watercraft, microlight and outboard engines mated to a streetbike 6 speed.

You will pretty much have to build cases which means either cutting and welding two engines and a gearbox or casting new ones. CNC the thing out of one big chunk of magnesium would be my ultimate way to turn money into noise and small chips of metal.

Hack apart a late model MXer and make the new engine fit. Modify plastic and then you're done.

Gee, that sounds easy - let me know when you're done :confused:


Posted by: spanky250---------------------

Just take a look at some of the outrageous machines used in hill-climb competitions. 1100 cc four cylinder street engines stuffed into lengthened dirt chassis, pushing incredible amounts of horsepower. Your imagination is the only limit, other than maybe your physical ability to hang on .


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

The SeaDoo 800Xp engine would be a good candidate. however that engine is large and will not adapt to a trans well. That is beyond the scope of what I want to fabricate. A big bore, 500cc version of the banshee engine would be nice. Can that be done?

Having owned highly modded big bore 2 strokes, I can say that they are a bit much to manage, and vibrate a lot. That is why I would like the 2 cylinder 800cc mild tuning approach. I would consider a counterbalanced CR600 big bore though. That would be a blast in an AF package. Just how I install a counterbalancer is a good question.

Chris


Posted by: ballistic---------------------

I like the ultra HP idea. Lets see...:think ...umm... I know!!
... run nitro methane Hey, it works for John Force


Posted by: TM-Frank---------------------

When you think a stock CR or KX 500 doesn't make enough horsepower, you can order a Sidecar-MX engine from Koestler, a german Maico dealer. The 685 cc engine is said to make 85 HP in stock form.

http://koestler-bikeworld.de/maico_modelle_2001.htm


Posted by: MikeT---------------------

Quote:
Originally posted by cujet
I would consider a counterbalanced CR600 big bore though. That would be a blast in an AF package. Just how I install a counterbalancer is a good question.

Chris


Ahh cu, No offense but how much cashola are you lookin at spending on this project? You are talking MAJOR money here. Usually these projects run into more $$$$ than anyone ever thinks. What is your budget?


Posted by: LocoCD---------------------

Find an old Kawasaki 750 Mach 3 2-stroke engine...


Posted by: spanky250---------------------

Quote:
Originally posted by cujet
A big bore, 500cc version of the banshee engine would be nice. Can that be done?
The Banshee engine is based on the old RD 350 LC engine. There are enough parts out there to easily get 80-90 hp out of this engine, but it won't be very manageable as a dirt engine, and they become very cantankerous at this level of tune. Yamaha mada a 500cc RZ 500 two-stroke street rod, I believe it was near the 100 hp mark in stock tune, but good luck finding one. That old 750 Mach 3 engine was fast, but very peaky, and not an extremely reliable engine. They were also quite heavy for a two-stroke, and it would be very wide for a dirtbike, even more so than any of the twins. I'll bet you could get your hands on a Yamaha TZ 250 engine pretty cheap, and that would satisfy your horsepower cravings and then some.


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

Chris - Eric has done some really big XR engines in the 780cc range. I don't think you'll reach the horsepower level you're looking for but it's a workable engine with power to spare. Same thing goes for the CR500. A CR can be made incredibly powerful while still having reliability, lightweight, and some sort of reasonable manners.


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

As far as the cash budget on the proposed project, I would fabricate everything myself. This generally results in less cash out of pocket. Yes I would have to purchase a late model CR250 as a starting point. I would also have to purchase the engine.

I would to be able to ride it on the street and possibly down the highway as they have built roads where I used to ride. A vibrating 500+ 2 stroke becomes very uncomfortable for me on long rides. Although that 685cc 2 stroke realy turns me on That would be twice what I have now!

In reality, If is fairly easy to do I would like it. The big bore CR5 might be just the ticket. I guess I could fab a gear driven counterbalancer.

Chris


Posted by: sixstring4137785---------------------

I agree with Loco, A Kawasaki 750cc two stroke triple. I just saw National hill climb in Monson, Ma. and the 750cc class is my favorite. A nicley modified four stroke turns a few heads but nothing like when someone fires up a triple.
Watch em go up the hill and just hear the extreme top end power. They put most of the 900 and 1100 cc superbike conversions to shame. I had to respond to this post because I remember catching myself daydreaming about what it would be like to take a rip down a fire road on a KX500 retrofitted with 750cc's of 2 stroke engine.


Posted by: SndyRds---------------------

This is warped....I like it!!! Very much!


Posted by: SeanATK---------------------

OMG!!!!!

I wish I could read German! That maico 685cc motor, in thier 620 Supermoto Racing chasis, sounds like just the ticket for my next MX bike turned Roadracer project! Anybody know how much they cost, or how I would get one into the states (racetrack use only) ????


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

I too would like to translate that Maico website and check out the big bore bikes.

I have forgotten if the PS rating is the same as HP

Chris


Posted by: David Trustrum---------------------

Sorry Spankx, reading from the sales brochure again? (ps congrats on the new icon).

Not to bring you to task but as you say the Banshee is derived from the RD/RZ a bit but the late powervalve RZ350s were putting out 49hp stock (rear wheel of course), & a set of decent pipes, some bigger carbs + a bit of a port got 60. After that you were really stretching it, although it is probably the most tuned street 2 stroke on the market so tuning knowledge is there ‘speshly in UK & Europe where they were dime a dozen.

The RD/RZ 500 were strange & never really came to much putting down about 70 rw hp. The RG500 Suz was lighter & laid out almost 80 & could be tuned to 100 or maybe more if you could afford the cranks. Good luck finding a non Chernobyl’d one

Cujet I know a place where some madman is getting a Honda VTR1000 shoe-horned into the remains of a KTM (or husky?) frame, if it ever gets completed it will be dangerous. My lawyer suggests I don’t recommend this.


Posted by: WWR---------------------

You may want to try and hunt down a used Honda NSR 250 engine. There were many of them made, and the later models (90-99) pulled really great horsepower. The only drawback is you have to get all the electrics with it, the powervalves are electronically controlled.

FWIW- my nearly stock NSR puts out just under 50 hp. Once I get the electrical system derestricted, it should be nearly 65. With a good port job, I have seen dyno charts of just under 80 hp.

If you want to spend the money and get a good one, HRC's RS 250 road racer puts out 92 horsepower. That would be the easiest way to go. Problem is, a 2002 RS 250 goes for nearly $20,000 and must be purchased through HRC (I think you need to be a registered racer for this).


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

Wow, those little 2fittys make a lot of power. I would be happier with that power being very lazy and easy to modulate, ie. done through displacement.

Chris


Posted by: SFO---------------------

I think that if I had similiar goals to what you have, Chris, I would try to hunt down a Folan motor.
Super light and small, 1000cc twin. Once you have the cases, husaberg parts will interchange.
The big twin 2 smoke sounds like DR Robs bike the Tulearis. I wouldn't want to have to build a primary drive and a gearbox.
Big single needs a counterbalancer, but then a twin is gonna be shakin' too unless you rubber mount it.
I put an evo sportster motor into a moto-morini frame once. Sportsters are smaller than you think, cheap, lotsa parts, and you can sell it $$$$
when your done cause it says Harley on it. (You just have to get over the stigma...)
In England I have seen guys cutting up kaw triples and making 4's, 5's, and 6's. I wouldn't use the old kaw motor because the trannies are a little overstressed. But it makes me think of building a v-twin cr-500/1000.!!!! It would be sick!


Posted by: BRush---------------------

Quote:
Originally posted by cujet
I too would like to translate that Maico website and check out the big bore bikes.

Chris


There are free sites that translate web pages. One is:

http://babelfish.altavista.com/translate.dyn

Just paste in the URL and Viola! Not a perfect translation, but not completely horrible either.


Posted by: LocoCD---------------------

These guys use a Chevy 350 V8 as a power source http://www.bosshoss.net .

I remember back in the day I guy could pump out 400-500 HP easy with that big block engine...


Posted by: spanky250---------------------

Quote:
Originally posted by David Trustrum
Not to bring you to task but as you say the Banshee is derived from the RD/RZ a bit but the late powervalve RZ350s were putting out 49hp stock (rear wheel of course), & a set of decent pipes, some bigger carbs + a bit of a port got 60. After that you were really stretching it, although it is probably the most tuned street 2 stroke on the market so tuning knowledge is there ‘speshly in UK & Europe where they were dime a dozen.
That's about right if you wanted it streetable. I had a friend in my home town that drag raced RD 350s, his 350 was dynoed at 92 hp (that's what he told me, I don't know it to be fact), but you sure wouldn't ride it on the street because it was very peaky and ran poorly when running at low rpms, and it would most likely blow in a short time. He certainly blew plenty of cranks and pistons at the track.


Posted by: JohninKY---------------------

The RZ500's I believe put out around 80HP stock. The engine is supposed to be reliable when modified to much higher output. I've heard of 100HP for the 500. 92 HP seems a bit high for the 350. Most modified 350's I've seen are in the 60HP range. Both motors would be heavy especially the V4 500 with 4 pipes/silencers/carbs.

http://www.rzrd500.com/

The NSR is probably the best of the 250's, but don't forget RGVs, TZ's or what about a reverse cylinder TZR250 with the carbs in front.

http://www.tz250.com/

Hey David Trustrum, how about crating up an RGV250 and sending it over here for me?


Posted by: Vetchap---------------------

Hi John -Dave here on a friend’s log in. How many RGVs do you want?

However there aren’t too many with the cranks in one piece. Also the PVs are riveted together & they wear & the top one falls into the cylinder causing untold damage.

Not many RZs put out 80 HP :D only the ones supplied to magazines managed that. My friend Matt is building one at present with usd forks, braced frame, & nikon pipes & I can’t wait to ride it.

Spankx, 92 Hp Out Of A RD350, well it would have to be drag only. Still pretty impressed. Either that or he had a friendly dyno. Must have been a rocket!!


Posted by: motopuffs---------------------

Aren't the Kaw triple 750s getting rare?

Jeez, that was what, 25 years ago they stopped making them?

Are there companies that make cranks and other parts for them?

I know where there are two of these sitting in a shed (with bird poop all over them), and they both turn over...


Posted by: spanky250---------------------

Quote:
Originally posted by Vetchap
Spankx, 92 Hp Out Of A RD350, well it would have to be drag only. Still pretty impressed. Either that or he had a friendly dyno. Must have been a rocket!!
As I said, I could not verify his claim for a fact, but it was indeed a drag bike, lowered and wheelie bar. It was quite fast, he won a fair share of races, but he had a problem keeping the engine alive for long. His most common failure was broken cranks, they would literally shear the crank right in the center. He finally gave up on the RDs, and moved on to racing KZ 1000s, with moderate success.


Posted by: JohninKY---------------------

Quote:
Originally posted by Vetchap
Hi John -Dave here on a friend’s log in. How many RGVs do you want?

However there aren’t too many with the cranks in one piece. Also the PVs are riveted together & they wear & the top one falls into the cylinder causing untold damage.

I've heard of the powervalve failures, but I thought they had changed the design. Maybe you better send over a half dozen so I'll have enough spares. Even a 10 year old RGV in decent shape will run around $4000 over here. I guess you always want what you can't have. I love my RZ, but it's a little on the ugly and poorly suspended side.
An RZ500 would be a cool donor motor. A pipe on each side and two coming out under the rear fender. A CR250 aluminum frame. You'd have to have money to burn to pull it off.


Posted by: SFO---------------------

LT 500
Quadzilla motor!


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

Quadzilla motor, huh. I forgot about that one. I will have to look at the engine next time I see a quadzilla. Were they powervalved? any big bore kits available?

Chris


Posted by: SFO---------------------

No powervalve, sorry.
I would measure the piston up, or just send it to Eric.
Stroke the crank for more.
Blue motor would look kinda weird in a cr chassis though...


Posted by: David Trustrum---------------------

Joninky

Yeah RGVs were a dime a dozen over here. Yes they did change the powervalve design on the later models (upside down forks/ banana arm swingarm) but the problem still remained. I know a chap who has a nice little sideline machining aftermarket powervalve components.

They run for about NZ$2500-3000 (~US$1200) for an old model & maybe a k more for a later one. Most succumbed to crank & top end failure or were crashed out of existence. Don’t lust too heavily, I preferred my hotted up 350, more midrange.

There still is a lot that can be done to a 350 & handling can be brought back from the dead paying careful attention to the st head & shock brgs which will have an inch of movement in them by now. Shock can be re-oiled. Very tire sensitive.
PS an FZ400 rear wheel can be easily machined to fir in the late model 350s, is the same pattern & is wider so you can run 130/70 without negatively disrupting handling.


Posted by: Guff Gearloose---------------------

David (and John),
I too know of the VTR/Husky hybrid that you mentioned, and am keeping an eye (ear) out for it's birthing cries.

The gentleman in question is also responsible for turning out (a few years back now) several RZ350-engined RGV-framed "specials" that not only looked the part but went as good as you'd expect.

As to the topic of a monster-engined dirtbike ... surely the US-based forum members must have heard about that Canadian (!?! ) guy who is running a snowmobile engine in a road-race frame in the AMA series ? (I read about it a while ago in the Road Racing America (?) paper) . Anyway, as I recall it he was getting something like 110-120hp at the rear wheel.


Posted by: Greg in Oz---------------------

It's probably not DIY enough but don't they run a little thing called the Dakar Rally? And don't the factories run 900cc v-twin Cagivas called the Elefant and wouldn't a 996 Ducati motor fit pretty easily and can't you get about 160 hp out of them. Or if you're teutonic minded wouldn't a R1150 GS beemer with the RS engine bits and some work put out 120+hp. Some real forks like they race with from WP and a little trimming would get them down to around XR650 weight. Nice big tank for some cruise range and sat nav for the boring bits. No pre-mixing either.


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

weight and size are a big factor in my plan. as is vibration and reliability-tractibility.

I have slightly revised my goals:

80+HP
water cooled
2 stroke parallel twin prefered, BIG 600cc 2 stroke single if counterbalanced 4 stroke single if turboed.
Twin 2 stroke of 500cc minimum dispalcement.
Single pipe requirement, Like jet skis.
powervalves a big plus.
XR650 is way too heavy
ZX11 engined dirt bike is not what I want.

I believe a good way to go would be 2ea CR250 cylinders with big bore kits, mated to a 6 speed gearbox. Using a single pipe and carb would simpify tuning and weight while keeping it mellow. An ultra narrow crank would have to be made. Sadly, this is beyond the scope of my time and money. The easy way would be to graft in an engine that comes close to meeting my needs.


Chris


Posted by: MikeT---------------------

Cujet, Listen, whenever you start this project you must keep us abreast with lots of photos because I can't wait to see what you will be doing.

I hearby say that it would be a tremendous injustice to all if we did not see your progress through this project.

When you gonna start?


Posted by: pineman---------------------

Run alky,we are getting 65+hp out of a 79yz250s,50+ 2000 cr125s,75+cr250s92 & newer motors.They are run in microsprints.


Posted by: David Trustrum---------------------

Sure you do that’s 400 hp per litre! vs say 264 per.

Been drinking it I reckon.


Posted by: motopuffs---------------------

doesn't alky usually only add about 10%? I realize some creative port work (including crankcase work) can help, particularly if you don't mind a peaky powerband.


Posted by: SFO---------------------

I gotta friend with a dyno that says never trust what people say their motors
"make".
I find it hard to keep a straight face when someone (my workmate) says his 125 is making over 50 dynojet hp.
Must be Jim Beam...
I know I have said some goofy stuff after dipping into ol' JB...
Still, on a serious note, I remember Rich saying alcohol kills throttle response...
So are alcohol burners flat on the throttle?
When I go to speedway races I can hear them opening and closing the throttle, could you use alcohol like a flywheel?
To soften throttle response?


Posted by: David Trustrum---------------------

Yeah until recently we were one of the last countries to allow alky in our national road race classes but now we are back to non-alc fuel. Throttle response is not as critical on the road if the compromise is more power. The cooling effects made it more of an advantage to 4 stroke twins & the like. Calorific value is much lower so not so hot for smaller 2 strokes. Man they would guzzle gas with jet size running about 2.3x size.

As a flywheel effect? Well it might hit softer but have none of the advantages of the built up potential energy of a heavier flywheel.


Posted by: SFO---------------------

My thought is that Rich has reported alcohol killing throttle response.
We can use b20 or mtbe to brighten throttle response, so couldn't the inverse be to use alcohol to deaden it? Using fuel to tailor throttle response?
Controlability?
I hear speedway racers wacking the throttle open and closed 3-4 times a corner. This is alcohol?
I understand that flywheel is storage, maybe fuel is another way to "fly by wire?"


Posted by: MikeT---------------------

OK cujet, I was looking around and found this website. I don't know if anything on the page is true or accurate but it seems feasable. You might want to contact this guy and see if you can buy an engine from him. He has already done all the work. How does this sound...

500cc V-twin
102 hp
It uses two YZ250 cylinders

The only problem I see is I don't know if he has the capeability of making another engine at this point, plus that foreward cylinder hangs a little low...

See what you think.

http://venus.13x.com/roadracingworl...00/roehrich.htm


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

Thanks for that link! very cool bike. That could work well it it were a parallel twin.

Chris


Posted by: spanky250---------------------

The problem with a "V" configuration in respect to a two-stroke would be the neccessity of having seperate crankcases for each cylinder, hence requiring two cranks. This would make for a heavy, bulky engine for a dirt bike. I suppose you could use a common crankcase if you used an offset crank-pin, where the pistons would move in unison, but I don't know how optimal this would be for making power, and it would certainly shake badly without a counterbalancer.


Posted by: David Trustrum---------------------

2 cranks? You mean 2 geared together? Surely not, a single double crank will do. Yeah you definitely need separate crankcases, but with a seal in between them.

RGV etc engines aren’t that heavy, well not compared to a twin 4 stroke. I mean like the Honda 500 V4s are single crank where the Yams & Suzs are twin crank geared together. The Hondas have always been pretty much the fastest so isn’t a big compromise (they all run balancers these days but that's another "big bang" story). Guess the 500 V twins they made were single crank though not sure.

Had a look at that link & see he has gone the 2 geared crank way presumably as it was easier to design, mind you 125 cylinders of the RGV are thinner than the 250 cylinders he was using so for bigger size maybe 2 are the go for thiness.

I seriously want one!!!


Posted by: KnobShredder---------------------

I think this is an awesome project. My $.02 is that it should have 2 iterations: a heavily modified single cylinder 550cc or so with crank balancer(so the thing doesn't shake itself to pieces) and a v-twin, crafted from 2 CR500's. that's right, if you're gonna do this, might as well do it right. and i'm talking 2 CR500's that have been breathed on heavily. I assume you want the thing to handle, so a forward facing v-twin that looks like this o< has to be the way to go. Imagine, the thing will weigh under 280lbs or so and put out far more than double the horsepower! my other thought was a xr650 with a turbo charger, although you would have to turn the boost waaaaay up, and it still will never handle like a moto-xer.


Posted by: MikeT---------------------

See what you started CU??? Now you MUST complete this project so we can all drool over it!


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

I have every intention of building somthing that has way more than the 50HP my Husky has now. The way I see it, 80HP is a minimum. Especially if I want to ride it on the highway. Can't go slow.

I have been researching the Banshee engine idea. Check out the T-Rex cylinders for the Banshee engine. Powervalved and all.
http://www.teamracersedge.com/

I have no Idea if the Banshee engine can be made to fit a CR250 frame. I suspect that engine is too big. I also suspect it needs more displacement for my application.

I can't stand it, I was finally beaten by a 4 stroke. My neighbor has an XR650 with the HRC piston and cam installed. He was far slower than me while uncorked but still stock. Now he pulls away .

Still searching for the right engine.

Chris


Posted by: MikeT---------------------

Beat by a 4-stroke... .... Now thats embarrassing! :D


Posted by: holeshot---------------------

I remember reading an article a while back that featured a '70's Suzuki 500cc, two stroke twin stuffed into a XR250 frame. The owner claimed that the smooth power delivery actually worked quite well in the dirt and yes, it was fast. The article is a bit foggy now, but if remember correctly, he claimed that the 500 twin was relatively light, weighing about the same as the XR250 engine .


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

How about turbocharging a Cannondale? the engine layout is perfect for a turbo. It is also injected so carburation/turbo problems do not exist. Might be another option.

Still would prefer a 2 stroke.

Chris


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

Quote:
Originally posted by cujet
It is also injected so carburation/turbo problems do not exist.


Carburation problems don't exist with turbos and EFI? Thanks Chris, that's the best laugh I've had in days


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

Hey Rich, where do you live? I want to come over to your house and smack you upside the head You are a wise A$$. You also have me laughing !

Sometimes what we write is not exactly what we mean, You should know what I mean.


Glad I could be of assistance!

Soooooooo, what do you think? Cannondale a good turbo candidate? Sure wont have any carb problems .


Chris


Posted by: LocoCD---------------------

How about a turbocharged XR650R?


Posted by: spanky250---------------------

Quote:
Originally posted by cujet
Soooooooo, what do you think? Cannondale a good turbo candidate? Sure wont have any carb problems .Chris
They have to make enough Cannondales for someone to actually be able to own one before it could be turbocharged.


Posted by: motopuffs---------------------

Gotta love that when they brag about how this years bike has all the problems fixed (that last year's bike had). How would that make you feel to have the manufacturer of your $7000 (just guessing, don't care) bike tell you flat out that they screwed up, but to really make everything right you have to buy another one?

Disclaimer: kudos to Cannondale for doing something different, anyway.


Posted by: KXaggerator---------------------

Last year I read one of those sand toy magazines and they did a test ride on a 120 hp Banshee. There is a company that sells a bolt on 20 psi blower kit that runs on alcohol for stock Banshees. Anybody who has been to Glamis during the high holidays and seen the sand drags is sure to be impresses by some of the drag Banshees out there. There are so many exotic parts for Banshee's that is would be the most cost effective route. There are 500cc + big bore kits for them. You could get close to 500 GP specs with the proper funds.
A friend of mine that has a motorsports shop wants to go all out and make my KX500 uncontrollably fast. His ideal is a Suzuki Cyclone type motor with twice the hp of the old crippler. I am still considering it.


Posted by: smb_racing---------------------

on the classic Can-Am website some guy stashed a Kaw 750 triple in a Can-Am frame and the page author reported on behalf of the guy that it makes 80 HP, but man it's a huge looking monstrousity :scream:


Posted by: IDkTm---------------------

Would this bike fit the bill for you? Take a look see. http://www.svrider.com/photos/sv-pi...pare2/side1.jpg


Posted by: smb_racing---------------------

Quote:
Originally posted by IDkTm
Would this bike fit the bill for you? Take a look see. http://www.svrider.com/photos/sv-pi...pare2/side1.jpg

is that an SV650 dirtbike??


Posted by: JohninKY---------------------

That's awesome. Probably street legal to boot. Wonder how much it weighs.


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

That looks really neat, I like it. I think it is a Suzuki SV650 based bike. It prob is very heavy and a little underpowered. As I understand it, those engines can make 70 RWHP in highly modified form. That is below my minimum goal of 80+ RWHP.

I have decided that a two stroke is the way I want to go. I also want a twin with over 500cc displacement. I will consider any method to make this work, including a combination of different manufacturers. It must end up in a conventional setup though.

Looking for suggestions.


Chris


Posted by: spanky250---------------------

Quote:
Originally posted by cujet
I have decided that a two stroke is the way I want to go. I also want a twin with over 500cc displacement. I will consider any method to make this work, including a combination of different manufacturers. It must end up in a conventional setup though.
So I guess the "Boss Hoss" route, with a 350hp 350cid V-8 is out of the question?


Posted by: David Trustrum---------------------

Well Bimota have just gone belly up, so there must be a few V-due 500V twin engines sitting at a receivers somewhere. Small light 500 2 smoke V twin engines, 80HP no problems.

OK the model was virtually responsible for the breaking of the company but once they put carbs on them (fuel injection was dodgy) they were supposed to be ok.

Now how well do you haggle in Italian? :silly:


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

Can anyone tell me what engine is on the bottle of Castrol TT-S oil? It looks like what I want.

Chris


Posted by: MikeT---------------------

All right CU. What is the schedule here..... I want production dates and completion times!!! We got to move on this one.


Posted by: Cole Smith---------------------

Have you considered the KTM LC8 engine
800cc 75 degree V twin weighs 56kg 75kW = 100 HP
available fall 2002 See More


Posted by: bwalker---------------------

Didnt Ktm make a 540 cc bike they called the Sand master? That motor should be able to hit 80+ hp.


Posted by: Guaryzzzpode---------------------

Quote:
Originally posted by JohninKY
That's awesome. Probably street legal to boot. Wonder how much it weighs.


The author claims weight of 148Kg, which is not too heavy.


Posted by: pursang262---------------------

You'ld have to adapt a gearbox and fabricate a primary drive, but a 750 jet ski engine is tiny. We had one on a dolley at the shop and rolled it under an engineless ninja 250 as a joke and there was tons of room.Chop the gearbox off a wrecked streetbike motor,use a belt primary like the Tularis, drive a waterpump off the crank,coupe of flatslides and some chambers,90-100 horse no problem.Aftermarket hot rod parts abound and you can get beat jet skis cheap. Just a thought.


Posted by: MikeT---------------------

The jetski thing has always intrigued me. I think that would be nice.


Posted by: LocoCD---------------------

Time to quit messing around...

http://www.motorcyclecity.com/turbine.htm

Jet turbine power, 300 HP and 425 FtLbs of torque, easily adapatible to an off-road frame, anything less is wussy.


Posted by: dirt bike dave---------------------

Yikes!

Good find, Loco.


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

I have seen the turbine bike, it is kinda cool. The guys who built that thing realy did a nice job. As I work for a rich guy who loves motorcycles, I was given the task of checking out this turbine bike. I suggested to my boss that he purchase one! Unfortunatly he was not seriously interested.

Chris


Posted by: spanky250---------------------

David Letterman has one of those turbine bikes. He was laughing about how he saw in his mirror the plastic front bumper of a car beside him at a light start to melt form the exhaust heat.


Posted by: FMX_novice---------------------

Dave Letterman is an old new york city geezer, do you mean Jay Leno? That guy is kool


Posted by: JohninKY---------------------

Quote:
Originally posted by FMX_novice
Dave Letterman is an old new york city geezer, do you mean Jay Leno? That guy is kool

When did Letterman become a geezer? He was cutting edge when I was in college. Hmm, I guess that was a decade and a half ago...
That said I can't imagine Letterman on a turbine powered cycle.


Posted by: spanky250---------------------

FMX is right, it was Leno...my bad...:o


Posted by: DeBarker---------------------

[QUOTE]Originally posted by cujet
[B]That looks really neat, I like it. I think it is a Suzuki SV650 based bike. It prob is very heavy and a little underpowered. As I understand it, those engines can make 70 RWHP in highly modified form. That is below my minimum goal of 80+ RWHP.

I have decided that a two stroke is the way I want to go. I also want a twin with over 500cc displacement. I will consider any method to make this work, including a combination of different manufacturers. It must end up in a conventional setup though.
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No man... those SV650's cam be made to put out 100 hp heavily modded and punched out to 750cc.

People are doing them for dirttrack and roadracing now.


Posted by: jski---------------------

The Banshee motor would be the way to go. I have seen several 400+cc Banshee motors and even some 700+ cc Snowmobile cylinder motors at the annual king of the hill contest at Sand Mountain here in Utah. There is a website planetsand.com that is dedicated to Hi-Horsepower sand machines and has posted the speeds and such from the last contest. Planet Sand also has a discussion board but it is just for everyone to tell how fast they are or how Banshees rule but take a look at the speeds and the motor sizes it might give you a better idea of what is possible.


Posted by: WWR---------------------

I know you mentioned a 500 twin, but have you looked at what you can get out of a modified KTM 550 engine? I am sure Eric can do it up right to pull some serious horsepower.


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

The big KTM engine is not an option. If I decide to use a big single 2 stroke I will probably use a KX or CR engine with a big bore setup.

Chris


Posted by: HiG4s---------------------

How about a 250cc twin that comes from the factory with 86.9hp?

http://it.yme.com/page.cfm?pageID=39033



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