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  1. #11

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    bow down usually is used for more aggressive turns and when racing you start with bow down

  2. #12

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    Quote Originally Posted by K447 View Post
    For a 2017 hull I will suggest starting with the Yamaha 2019 ride plate, which lifts the bow some and also improves hull tracking.

    Myself and several friends have 2017 GP1800 - all prefer the newer style ride plates (with the ‘cut’ channel in the lower plate surface).

    If you will be riding in waterS that may sometimes be less-than-smooth consider either the 2019 VXR intake grate or the Riva aftermarket intake grate.

    Does your model have BOTH nozzle Trim and Cruise controls? IIRC you could get one or the other depending on the model, but not both?

    Question: when swapping 2019 ride plate on a 2016 VXHO, would it REQUIRE the 2019 intake grate also? I'll probably do both anyway, because it's not much money. When replacing those parts do I need different bolts or spacer/washers or any sealant? I want to be sure I order everything necessary before taking stuff apart.

  3. #13
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by JonUF02 View Post
    Question: when swapping 2019 ride plate on a 2016 VXHO, would it REQUIRE the 2019 intake grate also? ...

    When replacing those parts do I need different bolts or spacer/washers or any sealant?
    I want to be sure I order everything necessary before taking stuff apart.
    Intake grate and ride plate are separate items and can be swapped independently.

    No special tools. Bolts are reusable.

    Sealant for the ride plate bolts is discussed in this thread.
    http://greenhulk.net/forums/showthre...=1#post3101044

    Regarding the intake grate, there are currently three (four?) good options.
    2019 Yamaha OEM GP1800R intake grate - aluminum, quite good all around

    Riva Gen 2 intake grate for GP1800 - stainless steel, excellent grip on the water, strong acceleration, minimal cavitation

    Riva Gen 1 intake grate for GP1800 - stainless steel, very good intake grate, slightly faster top speed than Riva Gen 2 but not as ‘locked down’ to the water.

    Yamaha 2021 intake grate for GP1800R SVHO - I don’t know much about this intake grate. It is aluminum IIRC.

    For any intake grate, I prefer to also use a ‘pump seal kit’ which fills the casting voids in the back of the grate. This allows for much better sealing and avoids jet pump ventilation. Riva sells kits for their grates.

    R&D used to sell a kit that fit into the OEM Yamaha intake grates. I forget if there is another source for pump seal kits to fit the Yamaha OEM intake grates.

    While you are doing the work, make sure the OEM flat rubber seal is correctly positioned and properly sealing.

  4. #14

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    Thanks for the reply. I'm pretty certain I'm going with the low cost option of 2019 OEM plate and grate, lots of good feedback and some say it's the same as a Riva (assuming gen 1) for older years. If "the man" says no sealant required, then I'll probably just go without it.


  5. #15
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by JonUF02 View Post
    ... I'm going with the low cost option of 2019 OEM plate and grate ... some say it's the same as a Riva (assuming gen 1) for older years...
    The Yamaha 2019 intake grate is not ‘the same’ as the Riva Gen 1.

    The 2021 GP1800R version may be interesting, but apparently the parts diagrams are not yet listed.
    http://partsfinder.onlinemicrofiche....modelyear=2021

    Riva Gen 1 has two thin bars made of stainless steel.
    Yamaha 2019 GP1800R intake grate has three thicker bars, made of aluminum.

    Comparison of the Riva Gen1 and Gen2 grates.
    http://greenhulk.net/forums/showthre...=1#post3094367

    http://greenhulk.net/forums/showthre...=1#post3006209

  6. #16

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    Quote Originally Posted by K447 View Post
    The Yamaha 2019 intake grate is not ‘the same’ as the Riva Gen 1.

    The 2021 GP1800R version may be interesting, but apparently the parts diagrams are not yet listed.
    http://partsfinder.onlinemicrofiche....modelyear=2021

    Riva Gen 1 has two thin bars made of stainless steel.
    Yamaha 2019 GP1800R intake grate has three thicker bars, made of aluminum.

    Comparison of the Riva Gen1 and Gen2 grates.
    http://greenhulk.net/forums/showthre...=1#post3094367

    http://greenhulk.net/forums/showthre...=1#post3006209


    I guess my focus was more on the ride plate vs. Riva. The intake grate, I don't want Riva because the larger opening without the center bar would leave you considerably more open to damaging the pump from debris.

  7. #17

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    One time I was riding my 2011 VXR after a storm, through a canal area and a dead tree branch below the water jammed in my intake grate, if not for the bars, my pump would have been toast. I had to reach down and yank out a 2ft x 1in branch from the grate.

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