Exhaust Backfire?
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Senior Member
Joined: Dec 2009
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From: Lakewood, Ohio
Exhaust Backfire?
ok so my bike seems to be backfiring when I decelerate. It seems fine when I'm accelerating but as soon as i let off the gas, there are small pops backfiring. I'm thinking it might be time to clean the carbs this winter. I just bought some sea foam and Im gonna see how that does. but id like some insight on my situation though
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Joined: Jul 2010
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From: hixson ,tennessee
ok so my bike seems to be backfiring when I decelerate. It seems fine when I'm accelerating but as soon as i let off the gas, there are small pops backfiring. I'm thinking it might be time to clean the carbs this winter. I just bought some sea foam and Im gonna see how that does. but id like some insight on my situation though
my brother love's sea foam i have never put it in anything if it works let me know ..........
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Joined: Jun 2009
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From: Grand Junction, CO
Mine was doing that and also shot some flames if it was a high rev shift. I pulled all the California emissions stuff off, and I also leaned the bike out a bit by dropping my needle position by a 1/2 clip (really only in the upper RPM range).. It solved it 100%. I made a quick Diagram on the removal with some photos I could PM anyone that wants it.
If it doesn't have the California emissions I would look for an exhaust leak or an overly rich condition.
If it doesn't have the California emissions I would look for an exhaust leak or an overly rich condition.
Senior Member
Joined: May 2010
Posts: 407
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From: Arvada, Colorado
Its not a big deal especially if you have a aftermarket pipe. Its just fuel being burnt in the exhaust. I love it when I get my bike to back fire, I get a super deep pop, almost like a gunshot.
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Joined: Jun 2010
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From: northeast ohio
ya it happened to mine the other day. piped (d&d) and jetted. My buddy and i trade bikes some times and it happened after a fly by. i think its normal under stressfull situations and high rpms, happens on the atv sometimes too.
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Joined: Jul 2010
Posts: 167
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From: hixson ,tennessee
Mine was doing that and also shot some flames if it was a high rev shift. I pulled all the California emissions stuff off, and I also leaned the bike out a bit by dropping my needle position by a 1/2 clip (really only in the upper RPM range).. It solved it 100%. I made a quick Diagram on the removal with some photos I could PM anyone that wants it.
If it doesn't have the California emissions I would look for an exhaust leak or an overly rich condition.
If it doesn't have the California emissions I would look for an exhaust leak or an overly rich condition.
Senior Member
Joined: Apr 2010
Posts: 107
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From: Northern Kentucky
My bike does the same thing. I've got a Yoshi slip on and a K&N air filter with the carbs jetted. I read somewhere that if you have backfiring that the jets are too big and to back them down a size until it goes away. I just haven't really felt like screwing with them and readjusting everything. Plus everything works great when I'm accelerating or cruising at a constant speed.
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