'98 300ex

[z99doc]

I have '98 300ex that was slow. So I have put weisco piston, web cam, and a yosh full exhaust on the bike. The problem I am having is jetting the motor. It came stock with a 122jet. I put a 124 jet in it and it still wants to spudar at half thottle. Tried a 124 jet does the same thing. Then tried to move the needle clip down one got worse. Moved the clip up two seems to run fine but the looks of the plug it is running lean. I need some help. Tech support at Dynojet sucks.

[Blue250X]

a 124 sounds pretty small, im running a 130 in my 250x and its a tan color.

[Sjorge450R]

if you are using the Dyno jets, try the way they say to do it for the needle postion and for the air screw, but for the main try a 128.