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  1. #1
    Matrix 4-Tec spannerspencer's Avatar
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    throttle body WOT question...

    ok so ive put a finger throttle on 05 rxp, and need to no, does the original thumb throttle lever open the throttle body butterfly fully open? (90deg of movement?) as my finger throttle dosent open it fully.

    it almost does, but there i feel it should be fully open for WOT.

    ....

    if it does need to open fully then i know how i can get the extra movent by slight modification to putterfly rocker.

    the finger throttle is from another jetski application.


  2. #2
    shrabber's Avatar
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    No grasshopper you can adjust the throttle cable( butterfly straight at wot fully closed at release) at throttlebody im assuming thats has a seadoo throttle cable? At idle position the butterfly "must" be fully closed dont monkey with the throttlebody. Leave that and painting to me

  3. #3
    Matrix 4-Tec spannerspencer's Avatar
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    Hmm, that means my finger lever isnt pulling the cable enough. ive sent is so cable it tight (butterfly fully closed) and am not getting wide open butterly on full pull.

    this is an arse. i was thinking of making the butterfly lever a larger diameter (to get more cable movement)

    this is what im getting
    Last edited by spannerspencer; 01-13-2013 at 08:27 AM.

  4. #4
    The last few degrees has very little effect on HP and torque. That being said, you should try to get the throttle blades fully open when the finger feed is wide open.

    I will be doing testing this spring with a stock 2012 RXP DBW bike with and without the speed limiter active.

    Andy

  5. #5
    Matrix 4-Tec spannerspencer's Avatar
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    this is my thoughts too.

    at work we have a 2 part black liguid thats sticks to plastic (dries hard) ill run this in the cable groove on the throttle body, (and bring the cable "v" further out. = move butterfly movement for same cable pull.

  6. #6
    Moderator beerdart's Avatar
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    Many aftermarket finger levers do not give the 4-tec a full pull they dont have the correct geometry. KVPI and PJS are two that have adjustable geometry and give the 4-tec a fullpull.


  7. #7
    Eric Ocman's Avatar
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    Quote Originally Posted by beerdart View Post
    Many aftermarket finger levers do not give the 4-tec a full pull they dont have the correct geometry. KVPI and PJS are two that have adjustable geometry and give the 4-tec a fullpull.

    The stock 08 Rxp-x one is a nice option as well.

  8. #8
    shrabber's Avatar
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    Quote Originally Posted by whittlebeast View Post
    The last few degrees has very little effect on HP and torque. That being said, you should try to get the throttle blades fully open when the finger feed is wide open.

    I will be doing testing this spring with a stock 2012 RXP DBW bike with and without the speed limiter active.

    Andy

    Don't know if I understood the comment but that butterfly flap in that position does make a difference and very huge when your talking 750 to 1000 cu motors.look at any race car setup watch the butterfly's open there perfectly flat so air passes through with little resistance as possible. The way that flap is a wot its getting diverted slightly

  9. #9
    Moderator beerdart's Avatar
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    Just an FYI the Seadoo throttle body can over rotate the butterfly passed 90* its best to adjust full pull to 90*

  10. #10
    shrabber's Avatar
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    Correct never know I seen some strange things here Steve I put nothing past me I even question myself sometimes so you can't adjust the throttle cable at the throttle body if your not getting full throttle you must have slack or is it you don't have extension??

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