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Thread: 2006 gp1300

  1. #1
    james gp1300's Avatar
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    2006 gp1300

    ok for most this is old news but went out for the last time today . upper bay . doing some speed checks . dplate installed .riva blue free flo exhaust hose going into a gp1200 water box with some extra holes drilled in the baffle plate. air box just open . all baffles removed. stock efi jim mod ride plate . 14/20 solas prop .polished pump . siphon nozzle. removed hole filled and polished. stock intake grate . center two bars thinned and polished. gp800 riva extened nozzle polished. inlarge air intakes under the side panels. low on fuel slight water chop. I am 6ft 180 . 71.1 gps yes!!! in the 70 mph club at least .love my gp1300!!! lol 75 mph next summer I hope.

  2. #2
    Try milling 20 thou or so off the lip (or all of the lip) off your OEM cylinder head and running the r&d 800 intake grate. Installing a r&d power plenum would compliment the rest of your mods. Hello 75.

  3. #3
    Happily Self-Employed WFO's Avatar
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    get
    rid
    of
    the
    stock
    intake
    grate
    NOW!

    you have been warned!

    and its a GPR, not a GP

  4. +1 by:


  5. #4
    Lol WFO!!! Yes what he said! Instant 90 degree turns over 65? You got it haha! Anyways...

    You will get bucked! I know from experience and lived to tell the tale!

  6. +1 by:

    WFO

  7. #5
    Best thing I ever did and picked up almost 2 mph

  8. #6
    james gp1300's Avatar
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    well actually its a gp1300r if we r worried about semantics .lol ok everybody hates the stock intake grate!! I seen that . so many options out there which one??

  9. #7
    james gp1300's Avatar
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    ty ya going pull the motor this winter . been a motorcycle mechanic sense 1975 ! lol retired . from my shop and dirt racing .so high performance two strokes r my thing . gona get vf3 reed set up. from rich get jim to do my head. not sure which air intake setup??? like the grate so many options??? mayb the advance key?? and I have a ejk fuel controller but have not needed yet ski runs great pulls strong! nice light brown plug readings .probably go through the top end clean and polish everything .

  10. #8
    improvised tmg97gp's Avatar
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    NOW !
    Quote Originally Posted by WFO View Post
    get
    rid
    of
    the
    stock
    intake
    grate
    NOW!

    you have been warned!

    and its a GPR, not a GP


  11. #9
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by james gp1300 View Post
    well actually its a gp1300r if we r worried about semantics .?
    not directed just to you but others that may be reading this... the reason I make a point about this is I sell a lot of used parts and give a lot of advice, and it gets confusing when people tell me they have a "GP" instead of "GPR"


    -1997-1999 GP760, GP800 and GP1200
    -2000-2008 GP800R, GP1200R and GP1300R
    -2017 GP1800

    all different hulls

  12. #10
    Happily Self-Employed WFO's Avatar
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    As far as the intake grate years ago we all did the testing and the stock grate can/will overstuff the pump above around 64-65mph, usually on deceleration, and the boat will go one direction while you go the other = yard sale

    aftermarket 1200R/1300R grate (same one) for all around performance, and the aftermarket 800R grate for top end only- no holeshot but 1+ mph faster on top end

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