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Old 02-19-2007, 10:17 PM
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MDH33 MDH33 is offline
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Location: Land of Corn
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I have never had a 2F apart so I can't speak from direct experience on this one, but I have had a bunch of old school Honda motorcycle engines apart. Many have long cam chains and jumping a tooth isn't unheard of. When they do, the valves contact each other or a valve and a piston contact, causing some disintegration/breakage. Likely cause of your plug damage. I would get the head off and take a look to see what's in there jamming in the valves.

Oleg has a rebuilt 2F for sale
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