Why is my Raptor 350 backfiring?
Why is my Raptor 350 backfiring? The cam chain is probably stretched and needs to be replaced. Pull the center bolt out of the chain tensioner then the two bolts holding it to the jug and count the number of clicks that are left, when the chain stretches the cam gets out of time and causes it to backfire at idle. Why does my Yamaha Raptor backfire? Backfires always mean LEAN. The raptor has a horrible airbox and intake system...which works on paper but not real life. About every yamaha I have seen needs a new aluminum air box or...