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Old 10-10-2012, 08:14 PM   #4
Beastly Adventurer
Joined: Oct 2007
Location: central USA
Oddometer: 6,419
How is it ported, piston or reed. Are pistons same height from wrist pin.
an there be some blockage in the exhaust.

I would get out a timing light and verify timing, it does sound like massively retarded spark. It could be a wrong crank with key in wrong pace.

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