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  1. #1

    Yamaha fx svho 2019 real performance

    i have a Yamaha 2019 with riva stage 1 plus and riva ride plate but max speed is 75 mph someone has an idea of why so much difference from those declared ?


  2. #2
    xkon's Avatar
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    Quote Originally Posted by cyborg View Post
    i have a Yamaha 2019 with riva stage 1 plus and riva ride plate but max speed is 75 mph someone has an idea of why so much difference from those declared ?
    Altitude, fuel level, rider weight, salt water vs freshwater, trim level, impeller pitch could be off, water temp, air temp or declared speeds are not accurate
    Last edited by xkon; 07-31-2019 at 12:30 PM.

  3. #3
    some one have a boat that work good with that kit ?
    my speed is gps speed i would like to know also if the max speed show on the cluster is 70 mph

  4. #4
    All boat cluster show max speed 70 mph?

  5. #5

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    Cyborg,
    I have the same ski with a stage 1 and fastest is 75.4mph on gps on relatively flat water. In a slight chop, speed will go down about 2 mph. Like xkon stated, there are a lot of factors that go into it. My speedometer also does not go above 70mph.

  6. #6
    Same ski and setup, same issue...trying to resolve with Riva

  7. #7
    MARCO PESSOA's Avatar
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    I Have an fx 19 with 70 hours, with 8500 stage 1 plus including Riva ribbon delete, Solas 13/18, Riva Kn power filter with water repellent cover, Riva intake grate with seal pump, Repositioned OEM 4 " hoses to stay away from the hull bottom, Anode cooling and Riva ride plate.
    Flat Salt water, 93 octane gas, 195 lbs rider, 81º F - Performance on GPS: 76,4 with rear seat and 77.4 without the rear seat. Rpm: 8000~8050. i Think 8000 ~ 8050 rpm is too low. Rechecked twice about air leaks and is pretty ok. Any ideas??

  8. #8
    Same setup and similar results, max about 8100 which is about 200-300 too low for Stage 1 plus, I am being told by Riva and Jerry this primarily due to my elevation of 910ft and the fact the tunes are developed at sea level. I am working on getting a de-pitched impeller to increase the max RPMs. There is a really good article on Greenhulk that describes the impact of elevation and how to do this yourself if you want?

  9. #9
    WaterDR's Avatar
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    With all these reports, I see no point in a stage 1.

  10. #10
    MARCO PESSOA's Avatar
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    Quote Originally Posted by gourlb1 View Post
    Same setup and similar results, max about 8100 which is about 200-300 too low for Stage 1 plus, I am being told by Riva and Jerry this primarily due to my elevation of 910ft and the fact the tunes are developed at sea level. I am working on getting a de-pitched impeller to increase the max RPMs. There is a really good article on Greenhulk that describes the impact of elevation and how to do this yourself if you want?
    the major problem is that i am already in sea level.....

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