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  1. #1
    Mongoose's Avatar
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    GPR-What would cause a piston crown to look dry?

    Front cylinder/piston crown and head looks bone dry as if it's not had any fuel.
    Plug colour looks good.New plugs fitted before test.
    2 other cyls/heads look 'wet' and when you run a finger over them you can feel thefuel/oil layer.
    Suspected a blocked carb-stripped cleaned, checked jets etc but all fine, and all passageways were full of fuel.
    Anybody got any ideas?????


  2. #2
    Haven't fallen yet. MJE's Avatar
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    can u post any pics? is your mixture screw the same as the others?

  3. #3
    Mongoose's Avatar
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    Quote Originally Posted by MJE View Post
    can u post any pics? is your mixture screw the same as the others?
    Sorry, don't have any pics.Just think piston crown/head shiney, new and free from any deposits/fuel oil. other bores feel a bit oily and sheen on pistons.
    All carbs rebuilt with the same highs/lows.
    it's a mystery-everything seems to be checking out-also all pulse lines are blowing nicley when I turn the engine over.

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