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  1. #1
    BigBoyRXP's Avatar
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    07 Ultra LX and 07 STX-12F Help please.

    Just bought a 07 Ultra LX and it seems the speedometer isn't working correctly. The wheel will spin freely but yet the gauge will only show that I'm going 20 MPH.

    Also I have a 07 STX-12F which ran fine 3 weeks ago, I took it out Sunday and it seems to not want to go above 38mph feels like I'm missing some power. Any thoughts?


  2. #2
    07 LX - It has to be the speedo wheel that is either sitting too high or not spinning freely.
    First move it down a bit.
    If above fails, swap out with the one in your 12F. It is the EXACTLY same sensor.

    For your 12F, the ski is not in SLO mode?
    What's the rpm reading at WOT?

  3. #3
    BigBoyRXP's Avatar
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    Sorry for the late reply. I took the 07 LX to dealer turns out it had a bad speedo which was covered under warranty.

    For the 12F, it is NOT in SLO mode. I ran fine the last time we took it out. WOT RPMs are reading around 5k. Oil has just been changed on it. Wondering if I need to put a set of new plugs.

  4. #4
    07 LX Speedo - If it had to be replaced, that means the shaft that speedo wheel is riding on got bent due to impact (probably on the trailer bunk).

    12F - Ski is missing at aleast 1700+rpm if you are getting only 5K at WOT.
    Measure the compression on each cyl and report.

  5. #5
    SCHNORR12's Avatar
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    Change the plugs in the 2007 STX-12F. My 2008 STX 15-F acted in a similar manner when one of the plugs were bad.

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