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  1. #1

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    Need the proper piston size?

    I bought some used pv nikasil cylinders. Does anyone know the specs and what to check so I can order the proper oem pistons, I have noticed yamaha makes 4 different standard piston sizes before you go to an overbore.


  2. #2
    Moderator beerdart's Avatar
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    Here are the specs for the 1200..

    Cylinder and piston combination
    Select the appropriate piston to match the
    cylinder size by the table as follows.
    Cylinder size indication a Piston color mark
    0 ~ 5 Red
    6 ~ 10 Orange
    11 ~ 15 Green
    16 ~ 18 Purple

    NOTE:
    New cylinder bore size = 80.000 + a/1,000
    Example: a = 12 ® 80.012 mm.

  3. #3
    Moderator RX951's Avatar
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    OEM Piston Sizes


  4. #4

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    Smile

    Quote Originally Posted by RX951 View Post
    THANKS you guys were a big help!!

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