300ex jetting

[catfishing]

A 1998 300ex. Added dg chrome full exhaust system.I am also leaving airbox lid off with UNI air filter.I am around 400ft above sea level.Any ideas would help on what size jets to start with.

[300exrider05]

start with a 128 main jet and work with the air/ fuel mixture screw and youll be ok.

i have a dg chromely and a moose airfilter.i need help with my jetting.u got any suggestions?

[bwamos]

Originally posted by catfishing
A 1998 300ex. Added dg chrome full exhaust system.I am also leaving airbox lid off with UNI air filter.I am around 400ft above sea level.Any ideas would help on what size jets to start with.

At 400ft I'd start with:
132 main, Needle clip in 4th slot (1 being the top slot, should raise the needle 1 position from stock), 3 turns out on the air screw, keep stock pilot.