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  1. #1

    XLT 1200 MPH Issue

    Built a ski for a friend of mine over the winter and it only does 45 MPH. Here are the Mods

    2004 XLT 1200
    155 PSI Head Mod
    Carb Rebuilt 110 pilot 120 main 1.5 n/s 95 gram spring
    Riva Stinger
    Pump Shoe Plug Kit
    Wave Eaters
    R&D Plate
    Solas 12/18 Prop
    Riva Grate
    Pre Mix
    Flame Arrestors

    I thought about changing the prop to a 13/19 to see if it helped.

    Surely this ski should do atleast 60-6mph

    Anyone have any ideas what's dragging it down.

  2. #2
    Ski Hacks MG's Avatar
    Join Date
    Apr 2013
    My 2002 XLT 1200's in stock form with D-Plates an WE's run 59-60 so it should run a good bit faster.

  3. #3
    Thanks Hopefully will chime in and give me an idea as to what it might be.

  4. #4
    On a positive note it comes out of the hole like gang busters!

  5. #5
    Yamaha artisan Cutlass's Avatar
    Join Date
    Oct 2010
    Madison, WI, USA
    GPS confirmed numbers or dream-o-meter? What's ur top engine RPM?
    maybe the power valves aren't moving.

  6. #6
    GPS confirmed. Power Valves are opening as they should. RPM's are around 6700

  7. #7
    CJ's gpr's Avatar
    Join Date
    Aug 2012
    Long Island
    love your thread title, dont we all have that issue

    whats your compression?nthough its probably irrelevant if you have strong take offs.

  8. #8
    I have a very similar issue with my xlt1200. I can't get it over 30 mph. Last season it did 50+.
    I'm curious what the problem is. I really hope I can fix it rather than a trip to the dealer.

  9. #9

    Join Date
    Mar 2013
    try the new spark plugs and premium fuel

  10. #10
    I am thinking it's PV related since the RPM's are a little low. I am going to adjust them today per the manual when I get off work. Its hitting about 6700 rpms which is low commpared to where it should be.

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