Js440/701 build
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Thread: Js440/701 build

  1. #1
    PWCToday Regular
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    Js440/701 build

    Figured I would make a little thread to document my progress and maybe get a few questions answered.
    1989 js440 Hull
    1994 61x 701 Yamaha motor with rhaas conversion kit
    sx550 pump and shaft with rhaas conversion bearing
    Attached Images Attached Images

  2. #2
    Top Dog Boz Mon's Avatar
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    Re: Js440/701 build

    This will be a cool build. Do you know what pipe and prop you’re gonna run?


    Sent from my iPhone using Tapatalk
    1994 FX1
    1985 JS550/650 conversion
    2015 Fiat 500 Abarth

  3. #3
    PWCToday Regular
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    Re: Js440/701 build

    Quote Originally Posted by Boz Mon View Post
    This will be a cool build. Do you know what pipe and prop you’re gonna run?


    Sent from my iPhone using Tapatalk
    For now I’m going to run the stock pipe. As for the prop my buddy has a mystery prop in the sx pump I picked up so I’ll run it and see how it feels if it’s bad I’ll get a 19 or 20 solas and be solid.

  4. #4
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    Re: Js440/701 build

    EBBB1735-E834-4696-8AF0-F319551515B4.jpegF7FD980C-4246-4FA0-B398-D0612205A481.jpeg4009DDFF-D2D3-4D15-ACA6-02738F2CA74D.jpeg1AF8A689-559E-4462-ADCE-4027014E2534.jpegC4BEA70A-A8AD-4CCE-9722-723CC3B48DF7.jpeg8C785833-5DE6-4220-A46C-E8692DBD3AF1.jpeg

    Got the ski all cleaned up ready for the mess of trimming the hull for the kit.
    Got the steering pretty much installed.
    Got the engine couplers removed and installed. Boy that was fun.

  5. #5
    I dream skis jetbum's Avatar
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    Re: Js440/701 build

    Good luck with the build. I just finished the install with a 6m6 motor, straight forward with the rhaas kit
    1989 sea doo resto mod in the works

  6. #6
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    Re: Js440/701 build

    Quote Originally Posted by jetbum View Post
    Good luck with the build. I just finished the install with a 6m6 motor, straight forward with the rhaas kit
    What did you do for cooling?
    I am having some thought conflicts. Thinking of tapping the pump for a second line and using the stock bilge hull line. I will be running a electric bilge no matter what so really not an issue there.
    Should I T the two lines together and run the motor with stock cooling or drill and tap the manifold and run a line to each side for better distributed cooling?
    Last edited by bigbtch; 04-06-2020 at 01:36 PM.

  7. #7
    I dream skis jetbum's Avatar
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    Re: Js440/701 build

    I thought about doing that as well. I just used to stock 550 line on my ski. It's a stock 650 for now and I will see how it goes
    1989 sea doo resto mod in the works

  8. #8
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    Re: Js440/701 build

    I welded a drill bit to a piece of rebar and slammed a piece of 1/2" copper pipe through, glued it in with some epoxy. The stock pipe I'm using as an extra outlet. One 1/2" makes more sense if your worried about shell and whatnot clogging it up if u ride saltwater.

  9. #9
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    Re: Js440/701 build

    Quote Originally Posted by jetbum View Post
    I thought about doing that as well. I just used to stock 550 line on my ski. It's a stock 650 for now and I will see how it goes
    After staring at it for a while imma start off by Ting the two stock lines together to ensure I get enough volume and if I need less or more I’ll go from there.
    Quote Originally Posted by Bobby.b. View Post
    I welded a drill bit to a piece of rebar and slammed a piece of 1/2" copper pipe through, glued it in with some epoxy. The stock pipe I'm using as an extra outlet. One 1/2" makes more sense if your worried about shell and whatnot clogging it up if u ride saltwater.
    Not too worried about cloggage as much as volume of water. I ride lake and rivers but it also gets real hot in the summer. Well over 100 at times and don’t want to cook the motor.

  10. #10
    I dream skis matt888's Avatar
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    Re: Js440/701 build

    Wish I had time to do this to one of mine.

    SOLD! HONDA AQUATRAX 2 SEATER
    1987 JS440 SUPERSTOCK
    1988 JS440 FREESTYLE
    1987 JS550 LIMITED
    SOLD AND MISSED VERY MUCH, 1994 WAVEBLASTER LIMITED
    WWW.HONDAOFWINTERHAVEN.COM
    1987 AM. WORLD CUP CHAMP
    My album http://www.pwctoday.com/album.php?albumid=2000
    https://youtu.be/S3KAF71mm4o

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