1990 js 550
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Thread: 1990 js 550

  1. #1
    PWCToday Regular standupsonly's Avatar
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    1990 js 550

    For sale 1990 JS 550.

    Completely restored
    new marine two part urethane paint job
    motor just rebuilt will new OEM crankshaft and seals
    new pistons and fresh bore
    many upgrades In perfect condition runs perfect.
    new everything
    located Seaford Long Island
    price $2300

  2. #2
    PWCToday Regular
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    Re: 1990 js 550

    clean

  3. #3
    PWCToday.com Is My Home Away From Home
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    Re: 1990 js 550

    1990? thought they were sx hulls already.

  4. #4
    PWCToday.com Is My Home Away From Home MrSki's Avatar
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    Re: 1990 js 550

    Quote Originally Posted by restosud View Post
    1990? thought they were sx hulls already.
    1990 is the first SX. But they were still piston port motors.
    1993 Laser Jet F15 - Mild port to PJS Cylinder.
    1992 Laser Jet F14 - Raced in 1992 World Finals.
    1992 550 SX - PJS Secret Weapon Big Bore, Kind of fast, LOL.
    1989 JS 550 - PJS motor Dual 46's, 50 MPH on GPS.
    1989 Wet Jet - Upgraded 1994 50 HP motor & exhaust. 45 MPH, yee ha!
    1986 JS 550 - Engine built. Working on fiberglass!
    1976 JS 400 - Pretty much just a shell. Sure want to restore this some day!

  5. #5
    PWCToday.com Is My Home Away From Home
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    Re: 1990 js 550

    Quote Originally Posted by MrSki View Post
    1990 is the first SX. But they were still piston port motors.
    yes,but this does not look like a sx hull.

  6. #6
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: 1990 js 550

    Quote Originally Posted by restosud View Post
    yes,but this does not look like a sx hull.
    I see a rear exhaust outlet......
    http://www.facebook.com/twinlakesjetskirepair

    '89 Kawi 650SX 42.4 GPS
    +3" stock pipe, ported ex. manifold, drilled waterbox, blueprinted pump, Ocean Pro ride plate

    '99 Yama GP1200 65U 61.8 GPS
    ported cylinders, matched cases, milled head, blueprinted pump, long ride plate

    '96 Seadoo HX 717 53.13 GPS
    light porting, massaged cases, lightened flywheel, port matched manifolds, Rossier pipe, stubby pump cone

  7. #7
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    Re: 1990 js 550

    Quote Originally Posted by restosud View Post
    yes,but this does not look like a sx hull.
    I'm certainly no expert, but I agree that something seems odd. I thought the SX hulls were "stepped" in the rear, and the FE hole was on the left side; the rear exhaust in an alcove of sorts with an open starboard side. Perhaps I'm thinking of a different year SX (mine came without a HIN)

    Regardless, it's a wicked machine!
    Last edited by pjbaz; 11-13-2020 at 12:09 PM.

  8. #8
    PWCToday.com Is My Home Away From Home PrickofMisery's Avatar
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    Re: 1990 js 550

    PJ you’re correct, It is not an SX hull. The right side end cap also doesn’t jive.


    Don’t fret though.... this is a super clean looking ski that appears to have been built well. Someone will certainly be happy.

  9. #9
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    Re: 1990 js 550

    Quote Originally Posted by PrickofMisery View Post
    PJ
    Don’t fret though.... this is a super clean looking ski that appears to have been built well. Someone will certainly be happy.
    Agreed!

    I can only dream of putting the time and effort into mine to look that good ... never going to happen. LOL

  10. #10
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: 1990 js 550

    I have to agree with both y'all. SUPER nice ski. You start adding up parts and then hours upon hours of labor to make one pretty..........

    No excuses for anybody looking now. Got this nice one in the Northeast, and the one MrSki is offering in the Southwest!
    Last edited by Myself; 11-13-2020 at 03:26 PM.
    http://www.facebook.com/twinlakesjetskirepair

    '89 Kawi 650SX 42.4 GPS
    +3" stock pipe, ported ex. manifold, drilled waterbox, blueprinted pump, Ocean Pro ride plate

    '99 Yama GP1200 65U 61.8 GPS
    ported cylinders, matched cases, milled head, blueprinted pump, long ride plate

    '96 Seadoo HX 717 53.13 GPS
    light porting, massaged cases, lightened flywheel, port matched manifolds, Rossier pipe, stubby pump cone

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