Hey Guys i need some help or advise. I have a 97 yamaha vmax 150 trp thats running rough. It will start up but back fires threw the exhaust. I put new plugs in and no change in the way it runs. I recheck the plugs and the left sides are dry but there are two on the right side that are wet. Could i have two coil packs down or what else might it be. Thanks in advance for any info you can provide
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