Popping Sound ??? - Yamaha Raptor Forum
 
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post #1 of 1 (permalink) Old 11-28-2011, 02:28 PM Thread Starter
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Popping Sound ???

I recently rejetted my wife's bike from a #155 main (too large) to a #150 main and took the bike on some trails. I was riding behind my wife's bike on my YFZ450 while we were going up and down some fairly steep terrain. While behind her Raptor 350, I could hear some occasional popping sounds but it only happens when she pulls the clutch in to coast down a steep hill. It doesn't happen any other time. I tried adjusting the idle screw on the side of the carb to see if that would remedy the popping but it didn't.

Any advice? Is this a jetting issue? Is this even a bad thing to happen or it normal?

Thanks in advance.

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2011 Yamaha 350 Raptor | HMF Competition Series Exhaust | ModQuad Airflow w/K&N Filter | EHS Racing Modded Air Box Lid | #25 Pilot Jet / #150 Main Jet | Air/Fuel Screw 2 1/2 Turns Out | Outlaw Shifter Mod | 12T Renthal Front Sprocket | Skat Trak Extreme 8-Paddle Rear Tires on Dougles Blue Label Wheels
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