Am I rich?

[RiverDrive]

My Sport Cup is doing a lot of "snap crackle & popping" when engine braking. Am I running rich? If so how do I adjust the mixture?

[Nobog]

My Tour will backfire about once every 500 miles when off the gas and coasting, otherwise runs perfect. It rather startles me as it is so seldom. JK, reason? good question...

[phlat65]

sounds like the carb deff needs some jetting, or there maybe some debris in the idle circuit. did you put on a pipe with no jetting changes? it is best to get a jet kit than try to set up yourself. not very adjustable carb..

[RiverDrive]

Yes I did put an M4 can on the bike last fall with no jetting changes. It ran great all winter. Just recently the weather heated up above 90F and I thought maybe the change in air density had something to do with it. The idle speed also dropped and had to adjust it.

[cdfisher]

Sometimes backfiring can indicate a lean condition. Call Dan at the number below and he will discuss what you could do. Tell him you're from the MZRiders forum.

[RiverDrive]

Thanks Curtis