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125 set up for mostly trail riding
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Posted by: crbrotha---------------------

i'm like 5"10, 150 pounds and i'm thinkin on gettin a cr 250 but i can get a better deal on a 125 of the same year. my question is i'm goin ot be using it for trail and some pit riding, is there anything i should do to make it a little better?

Posted by: Layton---------------------

Will it really be a better deal by the time you modify the 125?

If you do get a 125 then I would suggest getting a flywheel weight. That will make the 125 a little easier to ride in the woods.

Posted by: crbrotha---------------------

Quote:

Originally Posted by Layton

Will it really be a better deal by the time you modify the 125?

If you do get a 125 then I would suggest getting a flywheel weight. That will make the 125 a little easier to ride in the woods.

well i'd be saving about 1000 or so plus i havn't been on a dirtbike in a while or ridden a 250 two smoke. i'm just thinkin hte 125 would be good for a year or so until i get used to it then off to a 250.

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

CR 125's don't have a real good rep as far as motor goes, especially for trail riding. But I say, if it's got a motor and two wheels, rock on!!! Some good mods could be 2 more teeth than stock on the back sprocket, and a v force set up.

Posted by: Dewster---------------------

125's can be a blast to ride in the woods if setup right. Here's my 2 cents.

go down one or even two teeth on the front sprocket
revalve/respring the suspension. If you do it yourself, Gold Valves and Race Tech springs should run around $500. Well worth it and will make trail riding your 125 much more enjoyable.

Posted by: crbrotha---------------------

soo take one or two teeth off the front sprocket or one or two on the back? would flywheel weight be a good idea to look in to, would that spread out the power band some more so i don't gotta have it pinned all the time?

Posted by: D Lafleur---------------------

Quote:

Originally Posted by crbrotha

soo take one or two teeth off the front sprocket or one or two on the back? would flywheel weight be a good idea to look in to, would that spread out the power band some more so i don't gotta have it pinned all the time?

One tooth down on the front or two-three up on the rear, it depends on the bike. I wouldnt go with less than 12 teeth on the front and generally more than 54 is too much for the rear. The flywheel weight will only slow the motor's acceleration and deceleration. It doesnt spread the power. It doesnt improve low end tourque. It may keep you from stalling it because the motor has more rotating mass. If I were to ride a 125 offroad, I would work on getting the jetting spot on, the gearing right, and may be some power valve mod to get more bottom/mid out of the motor. On the KTM 125 we adjusted the power valve and added 2 teeth to the rear sprocket. The bike is sweet. Good luck.

Posted by: crbrotha---------------------

well the bike will be a 1998 cr 125 if that makes a difference to what sprocket tooth config. When u said u adjusted the power valve did u do exactly, also what settings did u change for the jetting?

Posted by: katoom125---------------------

I'm 6' 0" and weigh just under 200# - I have a KTM 125SX and love the bike in the woods - I have done virtually NO modifications other than spark arrestor to make it legal to ride trails and personal preference items like bark busters, etc. Since I'm heavier than you, even the stock suspension seems to work just fine - maybe a tad stiffer than an enduro bike but not bad at all and certainly very ridable.
Some guys do not like the powerband of 125's in general - to ride with speed, you do have to ride them more aggressively than a bigger bore - keeping the rpm's up - not short shifting and using a taller gear like you can do with the torque of a larger motor. The trade off is that you get an extremely light and "flickable" motorcycle which is great fun in the woods!
Go for it with your 125!

Posted by: SpeedyManiac---------------------

Another thing to consider is if you plan to race, what the class split is. With a 125 you could ride lightweight (and be on one of the most powerful bikes- lightweight is usually 200cc and under) where as on the 250 you would be up against all sorts of BIG bikes. That said, a 250 two-stroke seems to be the bike of choice for pros.

Posted by: Nevada Sixx---------------------

I have a 89 yz125 i ride in tight woods, best mods i made to it was low gearing (11/52), some plastic hand guards to keep vines out of my fingers,, and a barrel bag to hold spare sparkplug, wrench, masterlink, basic tools, and water bottle.

personally, i'd just get a new kdx200 as it seems upkeep on a used bike, and they payment on a new bike is about the same.

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125 set up for mostly trail riding

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