Are your plugs running white? To check you have to cruise down the road (as much load as is safe), push in the clutch turning off the ignition at the same time. Coast to the side of the road and pull the plugs there and check. If they are white, you are right about being lean. What motor are you running, and what is your timing set at? Reply to [email protected], not to private message mail on the bbs. Or feel free to call, 419-732-0060.