have a 91 suzuki gsxr1100 with stage 3 jet kit what size pilot jets how many turns on fuel mixture screw?

Question

keeps fouling out plugs popping and backfiring had carbs leaned

Answer 1

Pilot jets are not usually changed when installing a jet kit.
The mixture screw only affects the carbs from 0-1/4 throttle opening.
Not enough to foul plugs.
The mixture screws will help with popping & backfiring on de-acceleration.
Start them at 1 1/2 turns from closed.
Adjust them to get the smoothest idle, then close them 1/2 turn.
Send me your e-mail address and I'll forward you a copy of a carb troubleshooting guide.
It will explain what to adjust to correct specific running problems.

Answer 2

For some reason everyone seems to think tuning a carb is just real easy. Change a jet or two and boom, your there. Yeah, right ! There are quite literally millions and millions of jet combinations. A rough check on Bing carbs shows there are at least 13,860,000 different combinations of jets. If you are going to change carbs you'd better be prepared to spend some time and money on the job.

have a look at this site.... may help with the problems youve got..
http://www.dansmc.com/carbs2.htm

this is a good site for carbie tuning as well
http://au.geocities.com/ozcross250/needles.html