I plan to change my carbs main jets down from 145 to 140 in a few days and was wondering if I would need to adjust my air fuel ratios.

Now considering what a diagram called, "Where the parts do their part" in the

Keihin CVK40 website Part II - Tuning and Options section shows, it appears no adjustments would be necessary as the main jet doesn't really take effect until the throttle has been twisted between half and three quarters.

I was just interested what other's experiences were after changing their main jets.

Any ideas

Last edited by Staffo; 12/28/2010 7:40 AM.
Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.