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Posted on Apr 06, 2010
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I need to know what the compression needs to be

Need to know compression 2003 kx 125

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  • kawasaki Master 2,050 Answers
  • Posted on Apr 06, 2010
Anonymous
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Air filter clean, hold throttle wide open while kicking...at least 100 psi. 130-150 is good.

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Does anyone know what the compression ratio is for a kx 125

Why? What compression reading you got?

Generally less tha 90 it wont run. 140psi would be good. Over 160 would be too much.

If you havent shut the fuel off and the carb leaks then it likely that the crankcase is full of fuel and will give a false compression reading.
The most obvious way to check is to remove the expansion chamber, shake it around and listen for fluid in it. If it has fluid in it- IT GASOLINE- it will burn/ ignite!!!!! Be very careful and dispose of properly
Once you are sure the crankcase isnt full and the carb is right then check compression
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