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  1. #1

    boring q's on sl 750

    anybody know what kind of piston clearance i need to leave when boring the cylinders on a '95 sl 750? Taking them 1 mill over, but my pistons are not all exactly the same .001-.002 difference. Just want to get it right the first time. Thanks for any input.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    What make pistons are you using?

    Polaris OEM, WSM, or ???

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  4. #4

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    6-7 thousenths clearance for Wiseco's

  5. #5
    Thanks a lot man. let the boring begin!

  6. #6
    Ya know i'm gettin to thinking about it and i hate to question you, but that's pretty damn wide. Are you sure I'm safe goin that far out?

  7. #7
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by 785 lugs View Post
    6-7 thousenths clearance for Wiseco's
    I 100% agree.

  8. #8
    Thanks again guys. This forum and the people on it have been a huge help to me.

  9. #9
    ryandi2's Avatar
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    Quote Originally Posted by Boatski View Post
    Thanks again guys. This forum and the people on it have been a huge help to me.
    i belive its becasue the way wiscos expand.. they expand alot more then a oem piston does

  10. #10
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by ryandi2 View Post
    i belive its becasue the way wiscos expand.. they expand alot more then a oem piston does
    Not necessarily MORE, but faster than the cast pistons do.

    The piston expands faster than the cast iron cylinder and seizes when run hard on a cool motor. Once it's up to temp, it's really not an issue.

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