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Thread: seadoo 720

  1. #1

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    seadoo 720

    hi I have a 720 engine with the rossier cylinders and rossier head kit and factory pipe. I want to now how big carburators i need? I have the dual mikuni buckshot 48, do you think they are to big?


  2. #2
    X-Closed Course Racer xracer128's Avatar
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    Exclamation

    I ran 44mm Buckshots on my Rossier 720 motor with excellent race results!

    I would try 44's, 46's max...

  3. #3

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    Quote Originally Posted by xracer128 View Post
    I ran 44mm Buckshots on my Rossier 720 motor with excellent race results!

    I would try 44's, 46's max...

    do you think I should porting the cases? and what a kind rotary valve i need? I really want to run the 48`s

  4. #4
    X-Closed Course Racer xracer128's Avatar
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    Question

    You can only open the intake ports so much...just under 44mm. You can use the 48's, but will be restricted on flow!

    I always used the Rossier Rotary valve...

  5. #5

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    Quote Originally Posted by xracer128 View Post
    You can only open the intake ports so much...just under 44mm. You can use the 48's, but will be restricted on flow!

    I always used the Rossier Rotary valve...
    thanks. where can I buy the rossier valve?

  6. #6
    X-Closed Course Racer xracer128's Avatar
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    Unhappy

    They're no longer made...hopefully you can find one on the net or try www.sea-doo.net

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