- Reaction score
- Sheboygan, WI
I recently found out that a small pilot jet causes black plugs. I suspect that when the pilot circuit does not supply enough fuel to idle, you adjust your idle higher (throttle open more) and the needle jet starts supplying fuel. Double check you pilot jets next time the carb bowls are off. Physically remove them carefully and find the size number and insure they are clean.Yes, both seem to be running the same (as far as i can tell with it only running for 1-2 mins before shutting down), clanging is still there, however, want to try 5twins method of tightening the cam tension before investigating things deeper. pilot is 27.5 supposedly, according to rebuild kit.