another jetting question

[silverbullet300]

i ordered a white brothers R4 pipe today, and i was wondering what main jet should i run., and where should i position the needle. or should just buy a jet kit from white brothers.

[cals400ex]

i would not get the jet kit. i would run around a 152 or 155 keihin mainjet if your bike is all stock besides the pipe. the needle can be in the stock position (3rd) or in the 4th position.