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Everything Dirt Bike
General Dirt Bike
Popping on decel cause???
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<blockquote data-quote="SRAD97750" data-source="post: 230940" data-attributes="member: 425"><p>Air leak at the header is 99% the cause of my 4Ts backfiring on decel.</p><p>While some 'snarl' is normal in a rich deceleration with the engine engaged, if it's popping the moment you let off or loudly or in neutral, it's most likely cold air coming in contact with hot/unburnt combustible gases in the exhaust.</p><p>It can be at the header, or sometimes as far back as the pipe to header fit. -BIG DAN<img src="https://www.dirtbikeaddicts.com/static/images/smilies/thumb.gif" class="smilie" loading="lazy" alt=":thumb:" title="Thumb :thumb:" data-shortname=":thumb:" /></p></blockquote><p></p>
[QUOTE="SRAD97750, post: 230940, member: 425"] Air leak at the header is 99% the cause of my 4Ts backfiring on decel. While some 'snarl' is normal in a rich deceleration with the engine engaged, if it's popping the moment you let off or loudly or in neutral, it's most likely cold air coming in contact with hot/unburnt combustible gases in the exhaust. It can be at the header, or sometimes as far back as the pipe to header fit. -BIG DAN:thumb: [/QUOTE]
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Popping on decel cause???
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