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Tech: Testing 2-stroke compression
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ratherBriding
Mar 15, 2006, 1:30:09 PM3/15/06
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I finally broke down and bought a compression tester. Read up on the
proper method for testing, warm engine, throttle WO, kick until gauge
reached max PSI. Have 2 bikes at home, both were bought used with
unknown history, so no baseline PSI to compare to.
proper method for testing, warm engine, throttle WO, kick until gauge
reached max PSI. Have 2 bikes at home, both were bought used with
unknown history, so no baseline PSI to compare to.
Bike 1 is a '97 WR250Z (2-stroke) - got a reading of 210 psi, thought
that sounded pretty good, even higher than I expected.... does 210
sound close to spec? too high?? I have been hearing a little pinging on
hard acceleration, using 93 oct pump gas.
Bike 2 is son's "03 YZ85 - got a reading of 150 psi. This is low
compared to the WR, but I don't know how it compares to a healthy 85cc.
Anybody know what spec is on a YZ85?
Thanks for any help!
Bob S
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