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  1. #1
    TuningForkMarine's Avatar
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    GP800R intake grate on a GP1300R???

    Ih have read many people running GP800R intake grates on their GP12 and 1300 Skis... well i just so happen to get a hold of a GP800 grate and a GP1300 grate... Both are identical, and have same numbers on them . in fact if you search , the yamaha oem part number for all 800R 1200R and 1300R is 67X-51311-00-94

    SO riddle me this... Whats the big difference? as of now i dont see any.


  2. #2
    big john's Avatar
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    not the same at all, you either have two 800 grates or two 1200/300 grate, side by side you will see the difference in the rear scoop.

  3. #3
    Moderator beerdart's Avatar
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    I think he is talking stock grates.

  4. #4
    TuningForkMarine's Avatar
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    yea im talking bout stock grates... everyone tells me to switch my stock 13 grate for a stock 800 grate ....

  5. #5
    Happily Self-Employed WFO's Avatar
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    you need to throw all the stock grates in the trash and get an aftermarket grate before someone gets hurt

  6. #6

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    Quote Originally Posted by bystrov View Post

    SO riddle me this... Whats the big difference? .
    ANY GPR that has the ability to go faster than (about) 67 mph has a SERIOUS safety issue when they use the stock grate and decellerate from this speed or higher. There are hydrodynamic forces at play here where many people feel that the intake tunnel becomes "overstuffed". The hull has a tendency to make a hard right hand turn, and the wide eyed rider WILL be ejected. The G-forces are so strong, that most riders cannot hang on.

    The aftermarket 800 (and 1200) grate reduces the amount of water entering the intake tunnel at almost all speeds, and virtualy eliminates this issue. The 800 grate potentially increases your boats top speed by about 1 mph as well.

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