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  1. #1
    Antiguan FZR's Avatar
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    Camshaft Timing 4-Tec

    My RPMs are down (-300) after a full rebuild and I believe it may have something to do with timing.
    (New rings, Chain,Oil Pumps,Valves. ect) This all from a dropped washer that snapped my timing chain.
    What I found was that when I locked cam and crank and parralled the 1503 marks with the top of the head, it is always slightly off. The sprocket allows a few degrees adjustment but not enough to make it exact.
    What do the experts recommend?


  2. #2
    Site Admin Green Hulk's Avatar
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    Check your compression and let us know what it is. I can tell you if the cam is off once you get that number.

  3. #3
    Antiguan FZR's Avatar
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    Compression is 110 psi across all 3 cylinders.

  4. #4
    Site Admin Green Hulk's Avatar
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    Okay your cam timing is too far advanced. Retard the timing to the point you achieve 140-145 psi compression and your RPM should come back up.

    Let us know how it goes.

  5. #5
    Antiguan FZR's Avatar
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    Thanks! I will let you know..

  6. #6
    Quote Originally Posted by Green Hulk View Post
    Okay your cam timing is too far advanced. Retard the timing to the point you achieve 140-145 psi compression and your RPM should come back up.

    Let us know how it goes.
    how i know to what side i retard the cam right or left side

  7. #7
    Site Admin Green Hulk's Avatar
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    the cam sprocket will be turned more clockwise to advance it (bolts further to the left in the slots)

  8. #8
    ROTAX RACING performance
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    thats retarded
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  9. #9
    ROTAX RACING performance
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    setting
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  10. #10
    why the crankshaft its moving .

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