300ex jetting

[tolson]

:confused: i have a 2002 300ex with a white bros e-series and a k&n filter. does anyone have any jetting suggestions?

[redrunner]

This is the best advice i can offer!

[tolson]

i'm gonna try a 125 main jet.

[300exOH]

I have a 135 main in mine with a Sparks X4 and a UNI filter and a modded airbox lid. 125 may not be rich enough for you but it's a good starting point. You may want to pick up the next couple sizes and try them out. Your plug should be a nice tan color when you get it right. Good luck.