by JimDirt » Sun Mar 29, 2015 7:10 pm
If the 250X/R is the same as the 450X/R , then they will not fit , all the gears , as are the engine cases , are wider on the X , so nothing will interchange as far as i know
I know they make a ($500) "kit" for the 450R to make it a wide ratio , but i do not know if one is available for the 250R
I believe you are going to have to either go with a lower gearing/larger rear sprocket , which will lower your overall speed , or get a auto clutch so you can ride thru the places you need lower gearing and be the same elsewhere
If you ride strictly off-road or single track this is about your only choices (other than trading the R for a X)
If you ride both track and trail as i do on my 450R , then go with a larger rear sprocket and get a 120 link chain , and a extra master link , so you can use the "stock" gearing for the track , then swap rear sprocket (or another rim with a different size sprocket) , and swap back and forth , and adding the extra links with the swap to the larger sprocket works great , this is what i do on my R , and since there are only a few links added at most , you wont notice anything in the wear of the chain/sprockets when adding the extra links , i go from a 49 to a 52 and anywhere in between (50 or 51) with just 1 extra link and a extra master link
2020 CRF450R
2006 CRF450X
Weiser , Idaho