yoshimura pipe

[jasonex]

i just got a yoshimura rs3 slip on and was wondering if i need to rejet it should i bump up the main jet 1 size?:ermm:
i am also planing on getting a K&N air filter

i deffinately would. and I would wait unti you have the K&N too s you dont have to jet twice.

[jasonex]

so the main jet should be 150 or arounfd there right

[krt400ex]

do a 152 main, 40 or 42 pilot and drill like 4-6 one inch holes in the airbox lid.

turn the fuel screw out to like 2.5 turns. that should get you close.

[jasonex]

ok