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My Rebuild -- '77 GS750 Barn Find

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    #1

    My Rebuild -- '77 GS750 Barn Find

    I have a question at the bottom, but here are the first pics of my '77 GS750 rebuild. I found this old dog in a barn & it hadn't run in years. After countless hours of cleaning, rebuilding & replacing, I am now ready to put it all back together. This is my 1st rebuild & I will do every bit of the work. I hope to have it done before June.
    After the teardown, here's what I've done so far:
    -- GS1100 EZ front end - all rebuilt & progressive springs
    -- Converted to dual disks
    -- Frame painted Charcoal metallic
    -- Swingarm - new needle bearings Painted Brt Red (Bike will be Same)
    -- Ground off the milling marks and polished the wheels, repainted and clearcoated.
    -- Polished all engine cases, rebuild head & new piston rings
    -- Will upgrade rear disk to one off 04' GSX after I make new bracket
    -- Install XZF 600 rearsets
    -- Dyna S ignition & Coils
    -- Rebuilt the original wiring harness




    I bought a set of these (below) (13.2" & 440lb rating). Obviously there is a lot of weight to go on the bike, but after I put the shocks & rebuilt the forks today, I thought I'd throw the wheels so I could snap some pics and begin daydreaming.
    Question is, are they too long? I took the stand away and thought my 275lbs would compress them, but the dang things hardly budged. I was expecting the swingarm to be closer to parallel when sitting on it. Should I have gone to a 12.75" shock?


    Thanks goes out to everyone on this forum. Without it, I wouldn't have known where to begin.
    Last edited by dardoonk; 04-01-2007, 02:50 AM.
    Tags: None
    #2
    Not sure about the spring rating compared to stock, but I think the length is close enough.

    Don't worry about not compressing the new shocks. You seem to be missing a couple hundred pound of engine weight.


    .
    sigpic
    mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
    hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
    #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
    #2 son: 1980 GS1000G
    Family Portrait
    Siblings and Spouses
    Mom's first ride
    Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
    (Click on my username in the upper-left corner for e-mail info.)

    Comment

      #3
      Eat more cheeseburgers

      Comment

        #4
        That is some very thorough, very nice work. :-D One day I would like to take a GS down to the frame and do a complete refurbish. \\/
        Mike

        1982 GS1100EZ

        Text messages with my youngest brother Daniel right after he was paralyzed:

        Me: Hey Dan-O. Just wanted to say howdy & love ya!

        Dan-O: Howdy and Love you too. Doing good, feeling good.

        Me: Give 'em hell, Little Bro!

        Dan-O: Roger that! :)

        Comment

          #5
          very nice work! you must have some patience. my father started to tear down his 78 gs 750...6 months later i acquired a frame with the motor still in it and about 5 boxes of parts i got it all back together thanx. to this site. anyway as far as your shocks go i wouldn't worry about the hight untill you get the engine in place. my guess would be that the weight of it will slump everything down alittle.

          can't wait to see some more pic.

          Comment

            #6
            Originally posted by Zooks View Post
            Eat more cheeseburgers
            Zooks,
            Thanks, infinitely valuable advice. I am not looking to replace the weight of the engine with a belly of burgers. I just expected the darn thing to sag more than it did.

            deves3000gt, wrote:
            very nice work! you must have some patience...
            I appreciate the compliment, but it wasn't my intention to clean every nut & bolt. Originally, I thought I would just save an old bike from rotting away, but I grew fond of it and knew I wasn't going to be happy unless it was done right.
            Now that spring is here, the "patience" I had in the winter has been replaced by "anxious".

            Comment

              #7
              get rid of those shocks

              i bought a pair of those shocks, and unless you want alot of chiropractic bills i'd get rid of them. they were way too hard for my 750e and even when my 150kg boss sat on the bike they hardly moved.
              i learned my lesson about cheap shocks the hard way......

              Comment

                #8
                Great work so far. I'm doing the same thing to a GS1000. I'm a little ahead of you. I got my wiring all done and installed, I still have to go through the carbs before I can try to start it. I'm starting to get nervous, wondering if everything will work. I just want it to start, I can sort the rest out after that.

                I bought those shocks too. They are very stiff. I have my engine in the frame and they don't give much, even witht that weight. We'll see. I'll probably end up ditching them. I had to do something though. The old shocks were in bad shape and these were relatively cheap compared to a set of Hagons or Konis. Keep up the good work.

                Comment

                  #9
                  Marzocchi

                  I've got Marzocchis on my Kat. They are sweet. Good enough for Ducati, good enough for me.

                  or http://www.ducatimeccanica.com/marzocchi1.html

                  I really like them because they are easy to rebuild and adjustable.

                  Comment

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