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  • Lake St. Clair Rider
    Frequent Poster
    • Oct 2015
    • 247

    js550/650 build

    Bought a 1988 js550 for $240 dollars that needs some love. The engine was full of water so i decided to throw in a 650 I have laying around. I plan to tear everything down and repaint and re-assemble everything. As of right now I need a 550/650 conversion plate, steering cable, am waterbox, 650 pipe and maybe a different pitch prop (unsure on what size works best). Will post pictures along the way. Thanks, Zach
    1991 550sx stock

    1990js440/550sx coffmans half pipe

    1988js550/650 running/almost done

    1993 SN Superjet factory pipe

    1989 x2 stock
  • Lake St. Clair Rider
    Frequent Poster
    • Oct 2015
    • 247

    #2
    Re: js550/650 build

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    1991 550sx stock

    1990js440/550sx coffmans half pipe

    1988js550/650 running/almost done

    1993 SN Superjet factory pipe

    1989 x2 stock

    Comment

    • Lake St. Clair Rider
      Frequent Poster
      • Oct 2015
      • 247

      #3
      Re: js550/650 build

      Click image for larger version

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      1991 550sx stock

      1990js440/550sx coffmans half pipe

      1988js550/650 running/almost done

      1993 SN Superjet factory pipe

      1989 x2 stock

      Comment

      • Lake St. Clair Rider
        Frequent Poster
        • Oct 2015
        • 247

        #4
        Re: js550/650 build

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ID:	4373700 Also learned how to sub, so I thought I'd share lol.
        1991 550sx stock

        1990js440/550sx coffmans half pipe

        1988js550/650 running/almost done

        1993 SN Superjet factory pipe

        1989 x2 stock

        Comment

        • Jetskipunk
          Frequent Poster
          • Jan 2015
          • 260

          #5
          Re: js550/650 build

          looks awsome!![emoji106]

          Sent from my SM-G920P using Tapatalk

          Comment

          • Lake St. Clair Rider
            Frequent Poster
            • Oct 2015
            • 247

            #6
            Re: js550/650 build

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ID:	4373742 Took all the decal and turf off as well as all the parts. It is now ready to be sanded then painted. Also have a few cracks to patch. What should I use to patch these cracks? 650sx pipe found, still need a prop, waterbox, and steering cable. Lastly, are 650 steering cables the same as a 550?
            Last edited by Lake St. Clair Rider; 09-25-2017, 08:17 PM.
            1991 550sx stock

            1990js440/550sx coffmans half pipe

            1988js550/650 running/almost done

            1993 SN Superjet factory pipe

            1989 x2 stock

            Comment

            • still standin
              Resident Guru
              • Jul 2009
              • 1065

              #7
              Re: js550/650 build

              The Cables are not the same.

              I believe I have most of the parts you need.

              -Conversion plate
              -550 steering cable
              -steep Skat impeller for the conversion

              Send me a PM if interested in working out a deal.

              -2019 SXR - Unlimited Fixed Steer Conversion- 64.8mph
              -86 X2 - Twin carb 750 swap, blaster pipe etc -


              Comment

              • Lake St. Clair Rider
                Frequent Poster
                • Oct 2015
                • 247

                #8
                Re: js550/650 build

                Anyone got any suggestions to repair hull cracks?
                1991 550sx stock

                1990js440/550sx coffmans half pipe

                1988js550/650 running/almost done

                1993 SN Superjet factory pipe

                1989 x2 stock

                Comment

                • Lake St. Clair Rider
                  Frequent Poster
                  • Oct 2015
                  • 247

                  #9
                  Re: js550/650 build

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ID:	4373883 Started sanding down the the hull. Also thank you to still standing, jafaboy and dpast08 for the conversion/650 stuff. I still need 650 bolts to mount to the engine plate.
                  1991 550sx stock

                  1990js440/550sx coffmans half pipe

                  1988js550/650 running/almost done

                  1993 SN Superjet factory pipe

                  1989 x2 stock

                  Comment

                  • Lake St. Clair Rider
                    Frequent Poster
                    • Oct 2015
                    • 247

                    #10
                    Re: js550/650 build

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ID:	4374171 installed the conversion plate and set it in the hull to see how it looks. Still have a lot more cosmetic work to do before I can put it back together. Slowly coming together.
                    1991 550sx stock

                    1990js440/550sx coffmans half pipe

                    1988js550/650 running/almost done

                    1993 SN Superjet factory pipe

                    1989 x2 stock

                    Comment

                    • Lake St. Clair Rider
                      Frequent Poster
                      • Oct 2015
                      • 247

                      #11
                      Re: js550/650 build

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                      Got a little done while it was nice out
                      1991 550sx stock

                      1990js440/550sx coffmans half pipe

                      1988js550/650 running/almost done

                      1993 SN Superjet factory pipe

                      1989 x2 stock

                      Comment

                      • fastgtfairlane
                        PWCToday.com Is My Home Away From Home
                        • Apr 2010
                        • 3527

                        #12
                        Re: js550/650 build

                        to properly repair the cracks and not have to worry about them coming back or getting worse, youll need to and down the cracked area to get as much of the crack out as possible, then get some epoxy resin and some cloth, add several layers overlapping the entire cracked area by a few inches,then sand down and repaint.

                        if that filler you used isnt made for smc, it most likely wont hold. the vintage kawasakis are made of sheet molded compound or SMC and require very clean sanded surface and epoxy based fillers or resins. if the filler you used works with smc then you should be ok.
                        Last edited by fastgtfairlane; 02-27-2018, 09:24 PM.
                        96 superjet- rockered, -4, wide tray, adjustable footholds, kv148 mag setback pump, skat 7/14 impeller, rrp adjustable pole, blowsion ovp steering, 62t/62t, ada head, zeel A02T cdi, dual 44s, boysen power reeds, TNT SS chamber

                        93-x2, newmiller ported SP750, milled head, R&D single 46 intake, sbn46, fpp blaster chamber pipe, hooker 9/15, umi, rhaas squirrel cage, dakine foot straps

                        Comment

                        • Lake St. Clair Rider
                          Frequent Poster
                          • Oct 2015
                          • 247

                          #13
                          Re: js550/650 build

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                          1991 550sx stock

                          1990js440/550sx coffmans half pipe

                          1988js550/650 running/almost done

                          1993 SN Superjet factory pipe

                          1989 x2 stock

                          Comment

                          • Lake St. Clair Rider
                            Frequent Poster
                            • Oct 2015
                            • 247

                            #14
                            Re: js550/650 build

                            Originally posted by fastgtfairlane View Post
                            to properly repair the cracks and not have to worry about them coming back or getting worse, youll need to and down the cracked area to get as much of the crack out as possible, then get some epoxy resin and some cloth, add several layers overlapping the entire cracked area by a few inches,then sand down and repaint.

                            if that filler you used isnt made for smc, it most likely wont hold. the vintage kawasakis are made of sheet molded compound or SMC and require very clean sanded surface and epoxy based fillers or resins. if the filler you used works with smc then you should be ok.
                            i used pwc filler, I’ll have to see if it’s made for smc. Thanks
                            1991 550sx stock

                            1990js440/550sx coffmans half pipe

                            1988js550/650 running/almost done

                            1993 SN Superjet factory pipe

                            1989 x2 stock

                            Comment

                            • Sxsixfitty
                              Frequent Poster
                              • Nov 2014
                              • 205

                              #15
                              Re: js550/650 build

                              Future plans for a similar build so I will be lurking around on this one.....

                              Comment

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