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  1. #1
    JSR Brad Clarke's Avatar
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    Thumbs up RXP-X Rotax Racing ECU

    Has anyone tried one of these yet ?
    I want to run one with a Les Cooke C-Kit, 60mm Throttle body, 50lbs injectors and valve train upgrade. Ideas?


  2. #2
    The ski's have taken a "backseat" to the Corvette DarthAWM's Avatar
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    Quote Originally Posted by Brad Clarke View Post
    Has anyone tried one of these yet ?
    I want to run one with a Les Cooke C-Kit, 60mm Throttle body, 50lbs injectors and valve train upgrade. Ideas?
    If you are planning on going over stock RPMs definatly add the valvetrain upgrade.

  3. #3
    Best of both worlds! RXP & RXT's Avatar
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    I dont think it will work with 50lb injectors. Yop would be better to use the Riva ECU and RRFPR.

  4. #4
    JSR Brad Clarke's Avatar
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    Quote Originally Posted by RXP & RXT View Post
    I dont think it will work with 50lb injectors. Yop would be better to use the Riva ECU and RRFPR.
    Do Riva do a Brain for the 08 RXP-X ?

  5. #5
    Best of both worlds! RXP & RXT's Avatar
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    Quote Originally Posted by Brad Clarke View Post
    Do Riva do a Brain for the 08 RXP-X ?

    Give Carl Lamp a ring at Boyz Toyz he has a mate at Riva. He got me a good deal on an 05 ECU. Riva may tell him more over the phone than they want out on the internet...

  6. #6
    Quote Originally Posted by Brad Clarke View Post
    Has anyone tried one of these yet ?
    I want to run one with a Les Cooke C-Kit, 60mm Throttle body, 50lbs injectors and valve train upgrade. Ideas?
    the RR ecu for x models requires 60 lb injectors. you must do the valvetrain upgrade AND run light valves or have yours lightened. there is also a mod to the rocker shaft to be done.

  7. #7
    ctriverguy's Avatar
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    Quote Originally Posted by rotax racing View Post
    the RR ecu for x models requires 60 lb injectors. you must do the valvetrain upgrade AND run light valves or have yours lightened. there is also a mod to the rocker shaft to be done.

    Now that is news...where is the info on this posted?

  8. #8
    Quote Originally Posted by ctriverguy View Post
    Now that is news...where is the info on this posted?
    right here

  9. #9
    REID2168's Avatar
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    Quote Originally Posted by rotax racing View Post
    the RR ecu for x models requires 60 lb injectors. you must do the valvetrain upgrade AND run light valves or have yours lightened. there is also a mod to the rocker shaft to be done.

    im somewhat at a loss as to why u need the LIGHTENED VALVES and the ROCKER SHAFT work if people are already reving these engines to 9000+ RPM with various ems systems......WITHOUT doing this work...........u say now because this Rotax ECU revs to 8800 rpm this work is needed and it kinda makes me wonder .......WHY? thanks in advance for the information! appreciated!!!!!! BET!

  10. #10
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by ctriverguy View Post
    Now that is news...where is the info on this posted?

    with the new Rotax Racing ECU for X models with 8800 rev limit you must use the Rotax Racing 60 lb hr injectors.

    If you use the Rotax Racing spring retainers and shims you must also have the valves lightened. The Riva valvetrain upgrade kit has been run to 8800 rpm's and more with the stock valves with no problems. The higher rate springs make a difference.

    06 and up skis do not have an oil pressure jet for the head like the 03-05 blocks so on 06 and up you have to drill the orifice larger in the rocker shaft to get more oil to the head.

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