Honk if you've never seen a gun fired from a bike
Join Date: Dec 2008
Location: Collegeville, PA
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Backfiring happens all the time, in cars and bikes, you just don't hear it because the muffler/exhaust. Since you've modified it, now you do. What it is, is incomplete combustion, fuel is left over, and shot into the exhaust pipes. The heat from the pipes then ignites the vapor and boom, backfire. Not uncommon, should happen when decelerating in gear, the explosions aren't as violent, and don't get as much gas burned, so left-overs happen.
If you have it happening at times other than when you are decelerating, then yes, you are running to rich and need to adjust that, or you should perhaps check your timing, you might be experiencing detonation, which can sometimes not burn allt he fuel up, as it fires to early preventing the peak and optimal explosion.
2001 Yamaha Roadstar
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