CRF's Only Forums

Hello-

I have a 150F. Just put a Pro Circuit T4 on the bike and I am struggling to get the jetting right. I am up to a 100 main and no difference. All the issues are at top end. It stutters like not getting enough fuel.

Any help would be great I miss riding!

Thanks!
Jessica

Hello Jessica,

I too am having the same issue after adding an aftermarket pipe. Any information you may have figured out would be much appreciated!

did either of you ever get the right jetting set up? if so, whats the answer and what elevation do you ride at? thx!

You are probably looking at more like a 115 or 118 main jet rather than the 100 main the first post mentioned. I have a CRF125FB with an aftermarket exhaust and needed a 117.5 main jet (Granted I am basically at sea level). Here is a link to jetting a CRF150F:

viewtopic.php?f=12&t=13787