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Bestclimb is right. I burned holes in six pistons on a one cylinder 90 cc. Suzuki trail bike. It happened like clockwork every 2,000 miles. Then I remembered I'd changed the fender from a low mount to a high mount when all the piston burning started. I changed back to the low mount fender, and no more holed pistons. That little disruption in cooling air flow caused dangerous high temperatures. I hate to think what a vacuum leak can do.
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Darrell
Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
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