trx250r jet size ?

[thornton]

ive got a 85 atc 250r project. its got an trx250r motor its had a bunch of stuff done to it, like crank port polish second bore i think its a 265 if i remember right,also has boyensee reeds and a dg pipe and silencer, k n filter. ive got a keihin pe 35mm carb coming for it from ebay. i was wondering about what size jet i should be using and what size is stock

[Billy Golightly]

Kiehin PE, thats the round slide one, right? With the other stuff you have done to that motor, you really should be using a PWK or PWM series D-slide type carb. They are much better to tune and work better IMO. If you had a 35mm PWK, as a rich leaning ball park I'd say 185 main, bottom notch on the needle, and a 55 pilot. Realistically, you'd probably end up around a 170 something main, middle clip on the needle and a 52 pilot, but always start rich and work your way down. See the jetting guide in the World Class Help forum for some more info.