Nieskes Posted August 20, 2009 Report Share Posted August 20, 2009 fmf gold series 280 mains 27.5 pilots My bike runs great at all throttle but at idle it seems to cut out. When i pull the choke 1/2 it brings it back up. Im thinking im lean, but not sure what to go up on, pilots, mains, etc It seems to only cut out on one side also. Any help would be great, thanks. Quote Link to comment Share on other sites More sharing options...
quikshee Posted August 20, 2009 Report Share Posted August 20, 2009 (edited) Your jetting looks close, sounds like you need to adjust your airscrews. How many turns are they out? Edited August 20, 2009 by quikshee Quote Link to comment Share on other sites More sharing options...
dragbanshee Posted August 20, 2009 Report Share Posted August 20, 2009 fmf gold series 280 mains 27.5 pilots My bike runs great at all throttle but at idle it seems to cut out. When i pull the choke 1/2 it brings it back up. Im thinking im lean, but not sure what to go up on, pilots, mains, etc It seems to only cut out on one side also. Any help would be great, thanks. May want to check pilots one could be clogged, you should be fine with the jetting you have. Have you adjusted the a/f screws? Screw in and lightly seat them and back out 1.25 - 1.5 out. Oh yeah, nice chevy! Quote Link to comment Share on other sites More sharing options...
Nieskes Posted August 20, 2009 Author Report Share Posted August 20, 2009 I have taken the carbs out several times to check if its clogged. Always spray them out. I have not yet messed with the air screws, ill give that a try after work. Thanks Quote Link to comment Share on other sites More sharing options...
gbody Posted August 20, 2009 Report Share Posted August 20, 2009 Start at 1.5 turns then work your way from there . tighter is richer , looseing is lean , If that dont work you may need to go up one size. :cool: Quote Link to comment Share on other sites More sharing options...
billy d Posted August 20, 2009 Report Share Posted August 20, 2009 yes...but have you removed the pilots and cleaned them completely...if you have to choke it you need more fuel...and the 27.5 should be plenty big Quote Link to comment Share on other sites More sharing options...
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