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Discussion Starter #1
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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