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Help Compression test - MC22

Discussion in 'Honda 250cc In-line 4's' started by Mc22alexcbr250, May 19, 2017.

  1. Mc22alexcbr250

    Mc22alexcbr250 Member

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    Hi guyys i have a 91 mc22 im going to do a test on the cylinders what psi should each piston be and does anyone know if the ebay pistons are any good

    Cheers guys
     
  2. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    :welcome:

    Got a link for the eBay pistons?

    Would need to look at the service manual for compression test specs, but generally speaking you need to do it with throttle at WOT and the numbers should be close between cylinders.

    If readings are low, try a squirt of oil in the cylinders and retest. If numbers improve you have worn rings.

    A leak down test will be more comprehensive.
     
  3. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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