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Thread: worlds dumbest question
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08-04-2003, 11:48 AM #1
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worlds dumbest question
Ok this is goin to sound stupid but what exactly is leakdown, and should it be tested when bnuyin a motor used? also what should the compression numbers be on a stock 2001 3.1l yamaha vmax?
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08-04-2003, 12:08 PM #2
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It's not a dumb question
Alot of people don't know what it is. It is when you pressurize the cyl with air to see how much it leaks . Usually done at 100 psi to make the % easy to figure out.
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08-04-2003, 12:13 PM #3
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what are "normal" numbers
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08-04-2003, 12:25 PM #4
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%
For a race motor I hear guys tearing them down at 6-8% and for a lake motor it is up around 10-12%
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