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Thread: gp800 melt down

  1. #1

    gp800 melt down

    hi all. your thoughts on,25 hours old gp800 pv motor, going fine then lost power. top of one piston above ring land has started to destroy its self leaving some of top ring exposed. what causes this ?

  2. #2
    Banned User
    Join Date
    Jun 2010
    Milwaukee WI
    I would guess its on the exhaust side. Probably detonation from lean fuel mixture. Or its possible you dropped an exhaust valve.

  3. #3
    powerstroke specialist mikegp's Avatar
    Join Date
    Mar 2011
    if it helps , i have a almost new condition head for your 800r .

  4. #4
    thanks for that. seems to have leaned out. pv is ok.

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