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Old 01-14-2012, 08:52 PM   #1 (permalink)
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Default compression test

did a compression test on my 650 earlier hit hit 60 psi i hear it should be 74psi does any1 know wut is correct
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Old 01-14-2012, 11:08 PM   #2 (permalink)
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Cool

In the service manuel they say 74 psi at 390 rpm witch I think correspond to electric starting
They also say
Low compression can be caused by

-Blow cylinder head gasket
- improper valve adjustment
- valve leakage
-worn piston ring or cylinder

Hope it helps you !
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Last edited by Michel; 01-15-2012 at 12:38 AM.
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Old 01-15-2012, 03:52 PM   #3 (permalink)
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Default thanx

i figured it was something like tht im going to check valve lash if thts not it shes going back i just bought it lst week from a honda dealer in ga
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Old 01-15-2012, 06:11 PM   #4 (permalink)
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Wink

Hi , Another thing have you warm up the engine to normal operating temperature before testing the compression ?
It realy does a difference I've experienced it !
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Last edited by Michel; 01-15-2012 at 09:56 PM.
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