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  1. #1

    Minimal gains after install of parts..

    Hey guys - I finally got my 1200XLL all back together and took it out. I removed the catconv (jammed all the way down the exaust like a poatao), new Riva intake grate, pump seal kit, WaveEater clips and couplers. I was hoping to get some speed gains but I only gained about 1 mph in pretty smooth water. Cavitation is better but not completly gone with the pump kit. It would not get past 52mph on the dream-o-meter. It went 50-51 before the mods.

    Is this typical or any suggestions? Thanks

  2. #2
    mrbtd's Avatar
    Join Date
    Jul 2005
    Lindenhurst, Illinois, United States
    get a tach and gps - this is the best way to measure your results

  3. #3
    philip_gpr's Avatar
    Join Date
    Dec 2005
    Is this typical


  4. #4
    My son (mohawk man) jeffsntx's Avatar
    Join Date
    Sep 2006
    Belton TX
    The items that you installed are not "speed gaining" items. All of what you did needed to be done but are mostly "reliability" parts.

    Wave eaters- (clips) made to keep P/V from dropping and causing major engine damage. (couplers) made to take "slop" out of the OEM linkage.

    Pump plug kit- made to help cavitation.

    Intake grate- made to help "hook up". In some cases will add speed.

    And when you said you removed the cat con, you did install a d plate correct? If so, the d plate is made to replace the cat con which has a high failure rate.

    You probably need to seal the pump shoe with 4200-5200 and this will probably help with the cavitation issue that you are having. You may also want to look at the clearance between the prop and the liner.

  5. #5
    Thanks for the quick feedback. I did install the Dplate correctly. The catconv was pushed through and stuffed in the exaust pipe like a potato. I though that freeing up the flow of the exaust would help with some speed. I should have put a few washers in the front of the ride plate while I was down there.

  6. #6
    you should be 58 - 59 mph @ 7150 rpm stock

  7. #7
    WATER WOODY's Avatar
    Join Date
    Aug 2005
    Minden, Nevada, United States
    The D plate will give you lower rpm than the catcon,the grate will also scrub speed.Get a gps.

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