13-05-2019, 01:41 PM
To get the right needle position, screw up the jet adjusting but until the jet is level with the “bridge” in the throat of the carb. ( I guess you know this anyway) then screw it down two turns. (12 flats) that is where the needle is designed to operate. If you can’t get it right within a few flats, really you need a different needle. My Chummy runs on A BY needle which is quite a bit richer than GG.
Alan Fairless