Jetting prob

[InsAyneROostin]

Okay, i just got an FMF PC4 and i put a 150 main into the carb, like they suggest. and they also suggest removing the airbox snorkel...Which I did, and put a piece of cloth over the hole for an outerwear-type of thing. and then I put an outerwear on the filter, and put it all back together, and it still feels flat on top. Should i go out more turns on the air/fuel screw? or what? any advice would be appreciated. Thanks


Sparkrider #1

[InsAyneROostin]

should I put the stock filter on too? or an Uni? thanks again.


Sparkrider #1

[FF1O5]

I hope you took the airbox lid off when you removed the snorkle and put a piece of cloth over it?did you try different needle positions?I know crap about jetting but try some different needle positions and see if that solves the problem.I think a uni is a little bigger than stock,i would go with a uni if you have the extra $20 or whatever it cost.More area=more airflow=more power

[cals400ex]

yeah, i bet you need some more air if you put a piece of cloth over the hole. what size tires you running? what gearing? make sure your header pipes are aligned up perfecting in the head.