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Old 04-08-2012, 09:25 PM   #2
willis 2000
Joined: Oct 2011
Location: idaho
Oddometer: 3,605
try this

A poorly-sealed bottom end will cause this and other odd symptoms. Remove the carburetor and crank the engine slowly until the cylinder transfer ports are closed by the piston, but the rotary valve is somewhat open. Stick your face into the area previously occupied by the carburetor and blow into the carburetor mounting stub. Listen to where the air is escaping. Coming out the exhaust? Move the piston, your transfer ports are open. It will probably show the LH crank seal needs replaced. Face too big for the carb area? Get a kid, make 'em earn their keep. DAMHIK
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