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  1. #1

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    trimming rave valves!! Help please 787

    i have a 787 engine with hot rods crank and 84mm pistons. how much do you have to trim off of the stock rave valves for the correct clearence? thanks for the help


  2. #2

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    or specs please?

  3. #3
    If you went .50mm over then you need to trim .25mm
    If you went .75mm over then you need to trim .50mm
    And so on..

    The stock valves allow for the first .25mm over size piston - after that you MUST trim the valves..

    I would trim the amount of piston oversize, off the valves - just to be on the safe side..

  4. #4

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    Thank you soo much for the reply!!! Ill definitely do that! It always seems like one thing after another haha

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