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2001 Yamaha Big Bear 4x4
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Discussion Starter · #1 ·
My 2001 Yamaha Big Bear backfires through the carburetor on acceleration, I have put new carburetor, coil, spark plug, CDI, regulator, and adjusted the valves, it starts and idles good, but starts backfiring through the carburetor when I start to give it gas, but if I open up the throttle half way or wide open it runs good, confusing!! Anyone have any ideas ? Thanks
 
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