snysideup Posted December 2, 2003 Report Posted December 2, 2003 how do i tune the air gas mixture screws for optimal performance? could this also effect starting the bike? thanks in advance for any suggestions. Quote
Wheatchex Posted December 5, 2003 Report Posted December 5, 2003 Ok, here goes... The airscrews adjust the amount of air from idle to about 1/4 throttle opening range. This screw in conjunction with the pilot jet effectively work from 0 to 1/4 throttle. What you want to do is set the airscrews at 1 and 3/4 turns out from just snug. You will adjust them about 1/4 turn at a time to get the best throttle response off idle. Don't wack the throttle open from 0 to full. Go from 0-about 1/3 to 1/2. Turning the screw in richens the mixture and turning it out leans the mixture. If you get to either 1/2 turn out from snug or to 2 1/2 turns out from snug it's time to change your pilot jet. if it's in to 1/2 try the next size larger pilot. if it's 2 1/2 then try the next size smaller. Yes the screws could affect the starting of the bike but mostly operation off idle. The pilots and choke have a bigger impact on starting. Make sure you have good compression, good spark plugs and no air leaks before adjusting your jetting. Wheatchex Also check this website out for info on carb operation: Carb theory 101 Quote
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