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mate, best results for 4xv, kihan size 135, inners 132.5 outers on mains, reson your inners use more fuel as running hotter on inner pots,stock dyno …login to view the rest of this post

Thanks mate for reply what jets you useing with stage 1 dynojet kit.

Hi all need some help with jetting my 1999 4xv.i have a short gp can and k&n filter the bike is popping on tick over and decel .i have old dyno run at…login to view the rest of this post

Hi Jay and welcome to the forum, I think you'll find that you need to change the pilots and the needles, I had a dynojet kit for my 4XV and the pilots had to be changed at the same time as the needles


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Hi thanks was it a 1998 as think they had 15 pilots ...

Hi and thanks for replys still need some help about jetting if any one can help me out.

hi all im jason from cambridgeshire looking for help with carb set up and jetting on my 4xv any info would be great.
i have a 1999 r1 with k&n filter and stubby moto gp exhaust. popping on tick over and decel.
what jets do you lot use .are you all useing standed pilots and mains and just changing ...

hi all im jason and new to this site and looking for some help with my 4xv .not sure where to post , looking for help with carb set up ie jetting. thanks all