Dave
YaBB Moderator ModSquad
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SuzukiSavage.com Rocks!
Posts: 18099
Camp Springs, Kentucky
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Most of the carb settings before EPA mandates were about right when the screw was out about 1.5 turns. When I was rebuilding or cleaning a carb this was always my starting point for adjusting the idle mixture. When you turn the screw in the rpm's should drop, and it may even stall when the screw is turned in too far and the mixture becomes lean. If you back the screw out the rpm's should increase for a bit - then if you continue to turn the screw out the rpm's should drop and the smoohness and tone of the engine should change as the engine will be running rich. Once you have backed the screw out to 3 turnes the adjustment is gone as the tapered needle no longer is a restriction in the orifice - so if you back the screw out to 3 turns and it is not too rich.....then you either have a dirty Pilot Jet, need a larger Pilot Jet, or have an intake air leak.
If you can turn the mixture screw in all the way and it does not affect the way the engine runs....then you Pilot Jet is too big, the float level is too high, the air cleaner is too dirty, the idle is too high.....something is not right.
Do you have any idea what jet sizes your bike has....or if everything is stock? What year?
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