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1981 Kawasaki GPz550: Restoration

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    #31
    Why would the sprocket position change just because the cams were degreed?
    Last edited by Nessism; 12-24-2013, 11:58 AM.
    Ed

    To measure is to know.

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      #32
      Originally posted by blowerbike View Post
      when cams are degreed....the factory marks are no longer exactly in the same place because of the slotted sprockets and the lobe center changes that was made.
      Agreed, I will verify everything when I get to that point but I suspect the builder is off a tooth. I copied this from Corey's GPz550 manual so everyone will have a better visual to compare the pictures with.
      1979 GS1000E (44 Yrs), 1981 GPz550
      Departed: 1970 Yamaha R5A, 1971 R5B, 1975 Honda XL250, 1983 Suzuki PE175, 1983 CB1100F, 1983 BMW R100RS, 1992 ST1100

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        #33
        Originally posted by Nessism View Post
        Why would the sprocket position change just because the cams were degreed?
        i should have mentioned "along with after market cams".
        throw in chain stretch/different gasket thickness/head milling/chain guide wear.
        i seldom had marks line up exactly on modified engines.
        once you degree the cam's then you know all is good.
        just saying....

        Comment


          #34
          So, what you're saying is that the sprocket can be one tooth off and you can "degree" the cam into the correct position?

          I know you degree the cams after everything is all lined up
          1978 GS 1000 (since new)
          1979 GS 1000 (The Fridge, superbike replica project)
          1978 GS 1000 (parts)
          1981 GS 850 (anyone want a project?)
          1981 GPZ 550 (backroad screamer)
          1970 450 Mk IIID (THUMP!)
          2007 DRz 400S
          1999 ATK 490ES
          1994 DR 350SES

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            #35
            i'm just saying things don't always line up exactly...could be a half off front or rear.
            if he put's a degree wheel on it and used a positive stop and find's true TDC...
            his marks may not be off...if they still are then go a head and check the lobe centers and if they're close to say 102-105 then everything is probably lined up correctly.
            being a tooth off changes the cam timing by around 10 degree's give or take.
            maybe 8 degree's...maybe 12 degree's ect...

            i'm not the best at explaining via typing...
            must be an age thing

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              #36
              Good score ,should be a better bike with these mods,i had one for a few years but got sick to death of its narrow powerband and havin to rev it to death and changing gear constantly.
              Dont change anything you dont have to ,so far it seems full of the choice stuff,but I prob would have(from experience, doh) degreed up the engine prior to disturbing the cams to get a base point to start from,too late now but goodluck and keep us all posted on progress

              Comment


                #37
                I will work on my Z-1 order tomorrow, next I move the Mikuni Flatslides onto the workbench and spray all the linkages & screws with PB blaster to soak overnight. Looks like the none of the screws were ever disturbed.



                Installed a new battery in the Mitutyo D/C so we can see the readout again and the intake measures 26.89mm.

                1979 GS1000E (44 Yrs), 1981 GPz550
                Departed: 1970 Yamaha R5A, 1971 R5B, 1975 Honda XL250, 1983 Suzuki PE175, 1983 CB1100F, 1983 BMW R100RS, 1992 ST1100

                Comment


                  #38
                  Originally posted by Big T View Post
                  So, what you're saying is that the sprocket can be one tooth off and you can "degree" the cam into the correct position?

                  I know you degree the cams after everything is all lined up
                  I suspect that is the case with the exhaust cam considering it's current skewed position.
                  1979 GS1000E (44 Yrs), 1981 GPz550
                  Departed: 1970 Yamaha R5A, 1971 R5B, 1975 Honda XL250, 1983 Suzuki PE175, 1983 CB1100F, 1983 BMW R100RS, 1992 ST1100

                  Comment


                    #39
                    Mikuni RS27

                    Made good progress yesterday taking apart the RS27. I carefully took things apart since I know of no source of supply for the gaskets. I will need O-rings but I will be able to run these Carbs. So lots of photos and if anyone has good stock of O-rings let me know.



                    The carbs were never drained. . . varnish in the bowls & main jets. Plastic floats probably none adjustable right?


                    Remove the plastic floats, looks pretty good. I break out the magnifying glass standard N100 mains (107.5) & VM pilot jets (32.5). The pilot is probably way too BIG



                    These were pretty stubborn but with PB Blaster they broke free.



                    After I remove the four main jet holders, I look at the throttle linkage



                    As I hoped the varnish had merely fused the jet needle and needle jet together. The photo below shows full travel . . . enough said.



                    NICE


                    Remove the float needle & seat assembly . . . O -rings still look ok



                    Take of the top covers, Carb #3 appears to be the master.



                    Remove the throttle shaft, remove the slides & mark them.

                    1979 GS1000E (44 Yrs), 1981 GPz550
                    Departed: 1970 Yamaha R5A, 1971 R5B, 1975 Honda XL250, 1983 Suzuki PE175, 1983 CB1100F, 1983 BMW R100RS, 1992 ST1100

                    Comment


                      #40
                      This Primo impact driver always breaks loose screws easily and never screws anything up



                      Choke plungers were removed next



                      Top and bottom brackets along with choke linkage removed


                      Carb separation


                      Removed throttle linkage, spacers etc



                      Check out the needle bearings visible in this photo . . . Safe to Dip?


                      This cover facing the engine had tamper proof Torx screws which were Loctited in place. Lucky to get them out undamaged.



                      Got them off w/o damaging the gaskets. I will need new O-rings on that carb body below the choke tube (wrong term)



                      What a good mess

                      Last edited by srsupertrap; 12-29-2013, 01:54 PM.
                      1979 GS1000E (44 Yrs), 1981 GPz550
                      Departed: 1970 Yamaha R5A, 1971 R5B, 1975 Honda XL250, 1983 Suzuki PE175, 1983 CB1100F, 1983 BMW R100RS, 1992 ST1100

                      Comment


                        #41
                        Removed the idle air screws and they were all set at 3/4 turn out . . . this is after clean up.

                        Last edited by srsupertrap; 12-29-2013, 02:53 PM.
                        1979 GS1000E (44 Yrs), 1981 GPz550
                        Departed: 1970 Yamaha R5A, 1971 R5B, 1975 Honda XL250, 1983 Suzuki PE175, 1983 CB1100F, 1983 BMW R100RS, 1992 ST1100

                        Comment


                          #42
                          Good god. Those aren't like rebuilding a set of VM's, that's for sure. Looks like you're doing a top end rebuild on an engine I can see why you're taking all the photos. Sure enjoying the thread so far, thanks.
                          Rob
                          1983 1100ES, 98' ST1100, 02' DR-Z400E and a few other 'bits and pieces'
                          Are you on the GSR Google Earth Map yet? http://www.thegsresources.com/_forum...d.php?t=170533

                          Comment


                            #43
                            I want to thank Peter (madmito) a brand new member on The GPz550 forum for posting the Moriwaki KZ550 Cam Installation Instructions. That gives me the valve lash to set both my GPz550 cams to (.005 to .007"). Second he still has the cams in the box (See Below).

                            If he measures the cam lobe lift I can compare that measurement to the 8.25mm reading I measured on the Moriwaki Cams installed in my GPz550 which eliminates the need to measure cam duration & determine opening & closing numbers. Then I can focus on degreeing the cams.





                            That's madmito . . . looks like Dainese Leathers

                            Last edited by srsupertrap; 12-29-2013, 10:58 PM.
                            1979 GS1000E (44 Yrs), 1981 GPz550
                            Departed: 1970 Yamaha R5A, 1971 R5B, 1975 Honda XL250, 1983 Suzuki PE175, 1983 CB1100F, 1983 BMW R100RS, 1992 ST1100

                            Comment


                              #44
                              I keep forgetting which way do DOHC valve/bucket shims wear over time? Looking at the photo can I expect the Ex .007" to become tighter/looser over the next thousands of miles?

                              Thanks

                              1979 GS1000E (44 Yrs), 1981 GPz550
                              Departed: 1970 Yamaha R5A, 1971 R5B, 1975 Honda XL250, 1983 Suzuki PE175, 1983 CB1100F, 1983 BMW R100RS, 1992 ST1100

                              Comment


                                #45
                                Hi Steve, The clearances will get tighter as the seats wear. Ray
                                "Nobody goes there anymore, it's too crowded" -Yogi Berra
                                GS Valve Shim Club http://www.thegsresources.com/_forum...d.php?t=122394
                                1978 GS1000EC Back home with DJ
                                1979 GS1000SN The new hope
                                1986 VFR700F2 Recycled

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