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  1. #1
    kmaher's Avatar
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    GP1300r Piston Wash Evaluation

    Thoughts on the piston wash? 40:1 pre-mix machine

    Click image for larger version. 

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  2. #2
    Myself's Avatar
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    I think that looks great! If that was mine I'd leave it alone.

  3. +1 by:

    WFO

  4. #3
    Quote Originally Posted by kmaher View Post
    Thoughts on the piston wash? 40:1 pre-mix machine

    Do you have any compression test numbers?

  5. #4
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    Quote Originally Posted by steelmesh View Post
    Do you have any compression test numbers?
    Yeah, I was 140, 140, 128.

    Currently rebuilding the top end. Rings on cylinder 3 were worn and pin was loose. Narrowly averted a disaster! Just going to clean the cylinders (they look great), and install new needle bearings, pistons, and rings.

    I was trying to figure out if I wanted to richen fuel delivery just slightly, but I think I'm going to keep it how it is.

  6. #5
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    I was sort of wondering about the compression on #3 . You can see how the wash isn't as prevelant coming in from the secondary ports....mixture not moving quite as fast up out of the port.

  7. #6
    Good catch indeed. I got the ol' 2T snowmobile mentality, 'replace the pistons after xxxx miles', not a matter of if but when you're going to lose a piston.

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