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  1. #1

    why are there letters on top of the pistons of the gp1200r?

    and why they have different sizes?


  2. #2
    i got a piston marked "F"

  3. #3
    WATER WOODY's Avatar
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    "F" meaning Front-forward
    The arrow points toward exhaust port.

  4. #4
    all stock pistons thesame on the gpr?

  5. #5

  6. #6
    how to check piston color? and i have cylinders stamped 12 12 2, the pistons are all marked "F" and --> no other letters to identify...im confused, im just checking if the pistons are not matched with the cylinders stamped

  7. #7
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by andy95'slx780 View Post
    how to check piston color? and i have cylinders stamped 12 12 2, the pistons are all marked "F" and --> no other letters to identify...im confused, im just checking if the pistons are not matched with the cylinders stamped
    the correct way to check to see if the pistons are correct is to mic the piston, and use a bore gauge to check the clearance

  8. #8
    Quote Originally Posted by WFO View Post
    the correct way to check to see if the pistons are correct is to mic the piston, and use a bore gauge to check the clearance
    ok thanks.. all cylinder and pistons should be all same? right?

  9. #9
    is it possible that i have mag - 2 cen- 12 pto- 12 cylinder? not all the same? or it should be all the same?

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