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Old 08-06-2011, 12:07 AM   #21 (permalink)
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honda cb125 - '74 CB 125 S1
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With your engine fully warmed up, remove all of the spark plugs so the engine turns over easier, pull the fuel pump fuse so it's not adding fuel and with the throttle all the way open check the compression, it should be between 170 and 210psi.


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