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  1. #1
    scooby-rxp-doo's Avatar
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    Advancing The Cam?

    My Dealer has offered to advance my cam (for a fee of course!), he's been supporting one of our top seadoo racers, and recons a 10hp increase?

    Anyone on here heard of this mod?


  2. #2
    Site Admin Green Hulk's Avatar
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    I think he means retarding the cam. Yes, its a pretty common practice to retard the cam timing for more top end power.

  3. #3
    scooby-rxp-doo's Avatar
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    Cheers Jerry.... It's probably me that's got it incorrectly described!

  4. #4

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    Jerry, when i installed my stock class RR ECU in my 05' stage II RXT for the first time i noticed that my cam timing was already retarded from the factory, (the 3 allen bolts were all the way to the right in the slots) but in Israel 04' RXP the cam timing was advanced from the factory (the 3 allen bolts were all the way to the left) if this normal? do you know if the people from Rotax Racing are aware of this? thanks for your input

    Ray

  5. #5
    Site Admin Green Hulk's Avatar
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    Ray, it just depends on how they were assembled at the factory. Some are advanced, some retarded. This is alot of the reason you see some skis run faster than others.

  6. #6
    Vern's Avatar
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    How hard is it to look at the cam, and how hard is it to adjust this? I have never even pulled off the valve cover on my engine yet.

  7. #7
    Site Admin Green Hulk's Avatar
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    The valve cover is easily removed and there is an end cap on the back of the head that you remove to access the camshaft sprocket bolts.

  8. #8
    GTXX's Avatar
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    Is the valve cover gasket re-usable? I forgot to add one to my last parts order.

  9. #9
    David 1 FAST VE's Avatar
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    Jerry are we talking major gains or just so so for doing this to the stock cam?

  10. #10
    Site Admin Green Hulk's Avatar
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    Yes, the valve cover gasket is re useable.

    I have never messed with the cam timing on a stock ski, but plan to do it on Careys ski if i ever get a minute of free time.

    Playing with the cam timing on my ski has produces noticeable differences.

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