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  1. #1

    2012 FX SHO Cruiser bumping at 75 plus

    Have a 2012 FX SHO Cruiser with a stage three kit. When the ski is warming up and is over 75 it periodically bumps in the rear like it has hit a small wave. After the ski warms up the sensation disappears. The ski has a 160 mm pump setup with skat 14/19 impeller with oem nozzle. Any ideas on what is happening and how to cure it. Should I go back to the original pump and if so what impeller to keep my high speed? The ski has an r3 remap.

  2. #2
    tuningforks's Avatar
    Join Date
    Mar 2013
    Oconomowoc WI
    I'm not an expert, but wonder if that stock nozzle is too small.

  3. #3

    Join Date
    Jul 2005
    Central North Carolina
    If you still have the oem intake grate on it replace it with a good aftermarket one!

  4. #4
    The ski has a R & D intake grate on it. Thanks though for the suggestions.

  5. #5
    I have same ski, but with different mods, does 76.7, no bump. 13/23 impellor, stock pump, cool air intake, thru hull exhaust, R3 reflash, one step up on the s/c wheel.

  6. #6

    Join Date
    May 2009
    Nashville, Tn
    Just out of curiousity which wheels are you guys running?

  7. #7
    Thanks for asking. I'm running a C 3 wheel.

  8. #8
    What kind of rpms are you running? By the way I do not have the thru hull exhaust.

  9. #9
    Not sure on rpms my tiny tach quit. I forgot to mention I have Jim's rideplate, ribbon delete. I run with the trim one notch up. I weigh 250 and a biscuit. Speeds are gps.

  10. #10
    8300-8400 rpms

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