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Old 11-28-2011, 06:04 PM   #7
kellyh0225
Not Yet Wild
 
Join Date: Nov 2011
Posts: 3
Default Re: Black smoke, carbon and backfiring

Okay, now it is running better but pass 3/4 throttle it starts missing and back firing through the carb. Almost like a burnt intake valve. Any idea on the leak down #s for one of these motors and if it is an intake valve anyone had experience with this?

Thanks,

Kelly
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