85 atc250r???

[warpt]

i have a all stock 250r three wheeler that runs kinda funny. it pulls pretty good off bottom and mid range but just seems to go flat on top. i will be riding it fast in a gear and when it starts to rev it will just go flat and have not more power, then i will upshift and it will pull hard again up untill top. do you think its a jetting thing? i am not sure if thats the way they are suposeed to run stock?? i am thinking it must be a jetting thing.

[deathman53]

what pipe is on it? When I had a fmf pipe on mine, it did the same. Stock pipe would have very similar results too. I would get a different pipe, esr atc5.

[86 Quad R]

you running the stock round slide carb on there? what pipe are you running?

[oldskoolex400]

couldnt it be the port job? exhaust and intake could also be affecting this though

[86 Quad R]

chances are that if everything is still all stock, thats where the problem lies.

[oldskoolex400]

chances are that if everything is still all stock, thats where the problem lies.

yea its the carb i bet, i misread where it was all stock, ive ridden some woods 250rs that fall on their face on topend thanks to the port job