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Discussion Starter · #1 ·
I have a 2007 400ex. Just rebuilt it with a wiseco piston n rings bored .040 over and decided to put a stage 2 hot cam In it. Iv read that the decompression system is not needed with the stage 2 cam. We timed it correctly but still won't start?? what could this be. Has air , spark , and gasoline.
 
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