Sounds like I'm shooting at Ducks!! Is the Coasting Enricher adjustable.
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High RPM deceleration back fire
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if it is a carb bike check the vacuum line rubber cap on the top of the intake manifold to see if it fell off or is damaged. replace it when you see that it is and the issue will go away. It is very common that the rubber vacuum caps dry rot and cause a vacuum leak and a lean pop on decel.
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Backfiring is caused by a lean condition OR air leak.
You can adjust the air pilot screw and check for air leaks.
It can be exhaust leaking between the cylinder head and the exhaust pipe or air intake leak. NOT the air filter.
Jetting can be incorrect if you have not changed the jetting and you have a non stock air filter and non stock exhaust system.
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You didn't mention what you have for an exhaust system... installing any aftermarket system requires a little finesse to make sure all joints/connections are well sealed, and don't permit any cold, outside air leakage.
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yase, but did u say backfire out carb or exhaust? assuming exhaust, assuming this just started, no changes, bike didnt sit for long time. maybe eddie murphy stuck a banana in your tailpipe.
critters in air filter, leaky intake or exhaust at the head..........
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