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  1. #1

    Join Date
    May 2012

    Performance Improvements

    I have a Kawa STX 15F and would like to increase my top end speed. What in expensive options are there to get the ski to a 70 mph top end speed? It will presently do 63 top end.

  2. #2
    Formerly Ultra250 TN Aquaholic6801's Avatar
    Join Date
    Feb 2007
    Old Hickory,Tn
    To get to 70 your going to need a super charger or all the supporting mods to the engine internals............

  3. #3
    RLACEMAN's Avatar
    Join Date
    Aug 2011
    Random Lake WI
    R&D ride plate, R&D air filter, those 2 will get you about 4 mph increase, a Solas impeller will give you another 1 mph & quicker acceleration. You should be running close to 65(gps) with those add ons, the speedometer will be reading near 70 also. If you are running 63 according to the speedometer, you are really only going about 59-60mph.

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