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GS850 HC pistons & cam cap mods

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    #1

    GS850 HC pistons & cam cap mods

    Here are some pics of my custom pistons and the modified camshaft bearing caps that went into my 850. I'm not a prolific photo taker, hence the scarce number of pics.

    http://i155.photobucket.com/albums/s309/49er_photos/PistonLG_Mod.jpg

    http://i155.photobucket.com/albums/s309/49er_photos/Cap2.jpg

    http://i155.photobucket.com/albums/s309/49er_photos/Cap1.jpg


    For details of the cam cap machining proceedure, check out my previous posts under "Torqueing of torque".
    I will produce a more detailed photo and instruction record of the mods when I next have the cam cover off. This will be when the motor has seen 2000kms since the rebuild and will give a reasonable indication of wear and the likely success of the mods for a long term fix. After the first 800kms, endfloat knock is still non existant.
    Cheers
    Ian
    :) The road to hell is paved with good intentions......................................

    GS 850GN JE 894 10.5-1 pistons, Barnett Clutch, C-W 4-1, B-B MPD Ignition, Progressive suspension, Sport Demons. Sold
    GS 850GT JE 1023 11-1 pistons. Sold
    GS1150ES3 stock, V&H 4-1. Sold
    GS1100GD, future resto project. Sold

    http://i155.photobucket.com/albums/s...s/P1000001.jpg
    http://i155.photobucket.com/albums/s...s/P1000581.jpg
    Tags: None
    #2
    Looking good

    Make's me want to watch "World's Fastest Indian" again
    1166cc 1/8 ET 6.09@111.88
    1166cc on NOS, 1/8 ET 5.70@122.85
    1395cc 1/8 ET 6.0051@114.39
    1395cc on NOS, 1/8 ET 5.71@113.98 "With a broken wrist pin too"
    01 Sporty 1/8 ET 7.70@92.28, 1/4 ET 12.03@111.82

    Comment

      #3
      Originally posted by RacingJake View Post
      Looking good

      Make's me want to watch "World's Fastest Indian" again
      :shock: :shock: You need a reason!!! :-D

      Dink

      Comment

        #4
        Yeap, something about those pistons
        1166cc 1/8 ET 6.09@111.88
        1166cc on NOS, 1/8 ET 5.70@122.85
        1395cc 1/8 ET 6.0051@114.39
        1395cc on NOS, 1/8 ET 5.71@113.98 "With a broken wrist pin too"
        01 Sporty 1/8 ET 7.70@92.28, 1/4 ET 12.03@111.82

        Comment

          #5
          Originally posted by RacingJake View Post
          Yeap, something about those pistons
          Are you referring to those "offerings to the god of speed".
          Kiwis have a proven track record for engineering innovation and are encouraged to "look outside the square" for a solution.
          I watched TWFI for a second time last week when one of our local TV stations aired it. It amazes me that Berts class record was set in 1967 and that it still stands today. It is probably a twin class and up to 1000cc. Can anyone confirm that?
          If not, surely one of our "speed crazed" GSR members could launch a serious challenge to this record. Has it been challenged in recent years?
          :) The road to hell is paved with good intentions......................................

          GS 850GN JE 894 10.5-1 pistons, Barnett Clutch, C-W 4-1, B-B MPD Ignition, Progressive suspension, Sport Demons. Sold
          GS 850GT JE 1023 11-1 pistons. Sold
          GS1150ES3 stock, V&H 4-1. Sold
          GS1100GD, future resto project. Sold

          http://i155.photobucket.com/albums/s...s/P1000001.jpg
          http://i155.photobucket.com/albums/s...s/P1000581.jpg

          Comment

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