yoshi jettings ?

[300WheelyKing]

My buddy has a kfx 400 and is wanting to know how big he will have to go in general if he puts on a yoshi system and k&n on his bike. just a rough guess. Thanks

[woodsZrider]

call yosh, they will give the exact size.......

[300WheelyKing]

how would i get up with them? other than there website

[gkfx400]

i have a full yoshi & k&n i run a 150 main jet & 25 pilot
runs great in ohio. stock is 130 & 22.5