Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums - View Single Post - Backfire at high rpm on decel
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post #7 of (permalink) Old 07-10-2007, 09:06 AM
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Originally Posted by KENNETH FORTUNE View Post
What is the purpose of the reed vavles. I will do what it takes to get rid of as much popping as I can.
The reed valves are part of your emissions system - the idea is to introduce additional air into the carbs to burn off any unburnt fuel (before it hits your exhaust system and burns there). The popping on decel is - if I'm explaining this right - like little backfires as the fuel gets consumed. The only potential problem with marbling the valves is passing emissions inspection - not sure if you have to go through that or not. If you do, you can pull the marbles before inspection or just avoid marbling altogether and run it stock.

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