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  1. #1
    Duke's Avatar
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    1300 oem piston sizes

    Does anyone know what the sizes are for the 1300 oem pistons? I think there is 3 or 4 different sizes available in .0003/4 increments.


  2. #2
    My son (mohawk man) jeffsntx's Avatar
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    Small, medium, large and Xtra large????

  3. #3
    Duke's Avatar
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    So much help Jeff. What would I do without you.

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    Moderator RX951's Avatar
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    1300 GP1300R OEM piston size sizes

    Red: 83.89983.902 (3.30313.3032)

    Orange: 83.90383.906 (3.30333.3034)


    Green: 83.90783.910 (3.30343.3035)


    Purple: 83.91183.914 (3.30363.3037)

  5. #5
    Duke's Avatar
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    Thanks Billy.

    Am I seeing that there is only 1/2 thousandths difference from largest to smallest?

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    My son (mohawk man) jeffsntx's Avatar
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    Thats what I see.

    .0006 to be exact

  7. #7
    txgp1300r's Avatar
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    probably dont matter anyway...its so close

  8. #8
    mtrager's Avatar
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    The number on your cylinder determines which one you should get.

  9. #9
    Duke's Avatar
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    Quote Originally Posted by mtrager View Post
    The number on your cylinder determines which one you should get.
    I guess that would matter if they weren't 1200 cylinders bored and nicked to the OEM 1300 pistons I sent to have matched at .0038.

  10. #10
    mtrager's Avatar
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    I knew you would know that.

    I had to look in my shop manuel because my guy said at the Yamaha shop all the pistons were the same size.

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