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  1. #1

    Stock Speed 04 GPR?

    I have a stock 04' 13R that GPS's at 62.5

    There's 65 hours on the ski. I don't know the real rpm's yet but the tach is being shipped as we speak. I've smoothed out the stock rideplate and intake grate. (1mph from this). I've also replaced the plugs. From what I've seen others appear to have faster stock numbers then this. Is there anything I should look for? I plan on adding aftermarket parts in time but I wanted to see what I could get out of it stock, before adding aftermarket stuff.


  2. #2
    WATER WOODY's Avatar
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    whats you elevation.What exactly did you do to the grate and plate?

  3. #3
    Quote Originally Posted by WATER WOODY
    whats you elevation.What exactly did you do to the grate and plate?
    my elevation is 1070. To me the factory grate and plate seemed really rough from the casting marks and such, so I used small file to get the bigger things and a fine steelwool to polish it up.

  4. #4
    WATER WOODY's Avatar
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    Your saying that you gained 1 mph from that,so,you were only at 61.5mph? How are you testing your speeds? GPS,stock speedo?

  5. #5
    Quote Originally Posted by WATER WOODY
    Your saying that you gained 1 mph from that,so,you were only at 61.5mph? How are you testing your speeds? GPS,stock speedo?
    Correct... I was only at 61.5 via GPS

    I have also inspected the impeller and it appears to be in good shape.

  6. #6
    Happily Self-Employed WFO's Avatar
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    Welcome Super !

    My 04 was right at 64 mph stock. Check your pump shoe and see if it hangs lower than the hull. It should be recessed a little. That will scrub a lot of speed. My transom plate from the factory was lower on the right side also. It should be all the way up against the alignment tabs on both sides.

  7. #7
    Quote Originally Posted by WFO
    Welcome Super !

    My 04 was right at 64 mph stock. Check your pump shoe and see if it hangs lower than the hull. It should be recessed a little. That will scrub a lot of speed. My transom plate from the factory was lower on the right side also. It should be all the way up against the alignment tabs on both sides.
    Thanks.. I will check this tonight

  8. #8
    Moderator RX951's Avatar
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    Welcome to the Forum Super !

    Here are some links that can be useful when you start modding.

    First off, you need to ditch that stock intake grate !

    ask txgp1300r about that !


    1200R mods & things to do (see RX951's post)
    http://www.greenhulk.net/yamaha/view...t=things+first

    1300R mods & things to do (see Abbott's post)
    http://www.greenhulk.net/yamaha/view...a96632e3d21667

    How-to/FAQ section
    http://www.greenhulk.net/yamaha/viewforum.php?f=14

    when you do plan to add parts, look into an aftermarket ride plate and have it modified.
    Jim's Performance and Island Racing both sell aftermarket modified rideplates.

    Also, use our search feature for additional help or just plain ask

  9. #9
    Quote Originally Posted by Super
    Quote Originally Posted by WFO
    Check your pump shoe and see if it hangs lower than the hull. It should be recessed a little. That will scrub a lot of speed. My transom plate from the factory was lower on the right side also. It should be all the way up against the alignment tabs on both sides.
    Thanks.. I will check this tonight

    It appears that the pump shoe/intake are level with the hull. But the ride plate is higher... higher meaning looking at it from the rear its farther up in the hull. I have read about people shimming the ride plate down, is this what they are referring too? Because I could definitely drop the ride plate down to hopefully get it level. OR do I need to somehow raise the pump shoe and intake grate?

  10. #10
    Happily Self-Employed WFO's Avatar
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    The ride plate should be a little "higher" than the hull as the pump shoe. Take a straight edge/2' level and hold it along the sides of the hull next to the intake grate. You should be able to slide at least a .050 feeler gauge between the shoe and the straight edge.

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