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  1. #1

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    Seized wristpin help

    Hi
    I am rebuilding the top of my 97 gp 1200. I got one of the pistons off and the other two wont come off. the wristpins have rusted in place and wont budge. I removed the circlips, sprayed the pistons/pins in wd-40 and hve been tapping them lightly with a punch and hammer. I have also tried applying light heat with a torch but don't want to warp the pistons. Any sugestions as to how to get these pins out?

    thanks in advance


  2. #2
    Old Ski Insanity w/rpm500's Avatar
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    look for ideas online on how to build a pin press.. its basicly a threaded rod that goes thru the pin hole and uses an over size socket, nuts and washers to pull against...( if you grind the sockets end to the pistons radius,you may be able, with a good tape job to prevent maring on the mating surfaces, to reuse the piston ..) most pins and clips can be bought from WISECO ...

  3. #3
    Stop staring at my tits NJJer's Avatar
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    These things work wonders
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  4. #4
    Old Ski Insanity w/rpm500's Avatar
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    THANKS FOR THE PICTURE POST!! it works well for stuborn pins and this is an excellent picture of what one looks like done professionally..
    Nice tool Gerome!! (bet you'd like to hear that more often )

  5. #5

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    thanks for the sugestions. i looked up some ideas and made up a simplesetup that used a clam, a piec of wood and a 12mm socket. i clamped the socket on oneside of the piston (against pin) and the piece of wood on the other side to prevent damage. With a little tapping i was able to get one free and now need to conquer the others. Thanks for the help otherwise i would have been at that thing for days and may have resorted to using the sawzall

  6. #6
    Old Ski Insanity w/rpm500's Avatar
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    Glad you rigged a simple fixture to push it out with!!!

  7. #7

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    all 3 are out and ready for the new pins/clips/and bearings. thanks again for the help.

  8. #8
    Stop staring at my tits NJJer's Avatar
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    Quote Originally Posted by w/rpm500 View Post
    THANKS FOR THE PICTURE POST!! it works well for stuborn pins and this is an excellent picture of what one looks like done professionally..
    Nice tool Gerome!! (bet you'd like to hear that more often )
    DOH!!!!





    J

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