i have a 2003 KAWASAKI KFX 400 i just bought a new big gun race seirise pipe
and i think the guy told me to put a 150-165 main in it
but i want to know if i run the kfx with no new jets will it hurt it

i am keeping the air box cover in iT dose have a new fillter UNI HIGH FLOW BUT THATS IT.
THE MOTOR DOSE HAVE ANYTHING DONE

WHAT ARE THE JETS STOCK
AND WHAT SHOULD I PUT IN OR DO I HAVE TO

thanks help me out

 

a 150 or 165? thats a HUGE difference, and it matter's who's jets.
dynojet stage 1 kit, if you aren't changing the valves, cam, compression, or a major porting... pipe and jets, sir, stage 1, with an UNI, works great

 

what about taking the baffle out of the stock pipe with that hurt my my motor and will I get any profomance out of it

what are other tips and trick I can do to get more more power and profomance

and where can I buy a 145 jet that's what my new pipe recommends
thanks

 

what about taking the baffle out of the stock pipe with that hurt my my motor and will I get any profomance out of it

what are other tips and trick I can do to get more more power and profomance

and where can I buy a 145 jet that's what my new pipe recommends
thanks