raptor199
09-16-2006, 05:31 PM
Hey, I installed a yosimura rs-3 complete exhaust and a twin air filter on my raptor. I was just tryin to figure out what jetting I need to run. It has stock jetting right now. The quad runs great other than backfiring once every now and then when you kill the engine. Is that a sign of it being lean. The spark plug looks good. Do you have any suggestions.