1980 GS750L total rebuild from ground up to Cafe style

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  • Sam 78 GS750
    Forum Mentor
    Past Site Supporter
    • Aug 2014
    • 440
    • New Jersey

    #16
    Looking like a great start... I'm curious to see how this progresses.
    sigpic

    Check out my rebuild thread here: https://www.thegsresources.com/_foru...GS-750-Rebuild

    Comment

    • roeme
      Forum Sage
      Past Site Supporter
      • Jul 2015
      • 1206
      • Switzerland

      #17
      Yeah you're moving fast! Clearly not your first rodeo.

      10 amps on the electrolysis, correct?

      Looking forward to your process to clean up the wheels.
      #1: 1979 GS 550 EC "Red" – Very first Bike / Overhaul thread        New here? ☛ Read the Top 10 Newbie mistakes thread
      #2: 1978 GS 550 EC "Blue" – Can't make it a donor / "Rebuild" thread     Manuals (and much more): See Cliff's homepage here
      #3: 2014 Moto Guzzi V7 II Racer – One needs a runner while wrenching
      #4: 1980 Moto Guzzi V65C – Something to chill

      Comment

      • NickyGS750

        #18
        Originally posted by roeme
        Yeah you're moving fast! Clearly not your first rodeo.

        10 amps on the electrolysis, correct?

        Looking forward to your process to clean up the wheels.
        I am, once i get started on on a project its hard for me to stop haha

        Yes 10amp, wasnt too much rust inside the tank, thought about a 20amp but then thatd just be over kill. Definitely want it to be a slower process. Will be changing out the water here soon and give it another go. Will have a picture of the rod. I really should have taken a before picture of the inside of the tank, but slipped my mind.

        Pretty much every painted part will get stripped (like the whells) and then a quick soda blast to ruff'n up for powder coat. Everything will be a Satin Black.

        Comment

        • Guest

          #19
          Interesting build. Not a big fan of the ?L? models and am curious to see how it turns out.


          How does electrolysis compare to using Metal Rescue?

          Comment

          • NickyGS750

            #20
            Originally posted by jabcb
            Interesting build. Not a big fan of the “L” models and am curious to see how it turns out.


            How does electrolysis compare to using Metal Rescue?
            To me the results are pretty equal and get the job done, however metal rescue brings out the shine more of metal. Cost is definitely way different. For electrolysis i spent $6 for baking soda (i already had everything else) and it takes time (24-48 hours).
            Metal rescue youd have to buy enough to fill up the tank ($25 for a gallon) the 'L' tank holds 4.8 gallons so $125 right there give or take. And you have to apply heat to whatever you are soaking for it to really work. Just different factors in that way but it all just boils down to the doers preference.
            Last edited by Guest; 02-23-2018, 11:27 AM.

            Comment

            • NickyGS750

              #21
              Not too bad with the first run of electrolysis on the inside of gas tank for 24 hours. I just rinsed it out in the bathtub, lots of big flakes of rust poured out. Going to do another 24 hours and then ill dry it out completly, oil the outside, bag it up and itll be ready to powder coat once everything else is prep'd.

              Last edited by Guest; 02-23-2018, 02:43 PM.

              Comment

              • NickyGS750

                #22
                Carbs disassembled and cleaned, bagged and tagged. Ready for soda blasting and powder coat. Simple green cleaner goes a long way!

                Comment

                • roeme
                  Forum Sage
                  Past Site Supporter
                  • Jul 2015
                  • 1206
                  • Switzerland

                  #23
                  Very interesting to see where the rust deposits; to me it corresponds roughly to where the tank insides are free of gas most of the time, exposed to the atmosphere (and hence, water). Assuming the stuff takes the shortest path.
                  #1: 1979 GS 550 EC "Red" – Very first Bike / Overhaul thread        New here? ☛ Read the Top 10 Newbie mistakes thread
                  #2: 1978 GS 550 EC "Blue" – Can't make it a donor / "Rebuild" thread     Manuals (and much more): See Cliff's homepage here
                  #3: 2014 Moto Guzzi V7 II Racer – One needs a runner while wrenching
                  #4: 1980 Moto Guzzi V65C – Something to chill

                  Comment

                  • roeme
                    Forum Sage
                    Past Site Supporter
                    • Jul 2015
                    • 1206
                    • Switzerland

                    #24
                    Wait, these carbs haven't even seen an ultrasonic? They look hella nice.
                    #1: 1979 GS 550 EC "Red" – Very first Bike / Overhaul thread        New here? ☛ Read the Top 10 Newbie mistakes thread
                    #2: 1978 GS 550 EC "Blue" – Can't make it a donor / "Rebuild" thread     Manuals (and much more): See Cliff's homepage here
                    #3: 2014 Moto Guzzi V7 II Racer – One needs a runner while wrenching
                    #4: 1980 Moto Guzzi V65C – Something to chill

                    Comment

                    • NickyGS750

                      #25
                      Originally posted by roeme
                      Very interesting to see where the rust deposits; to me it corresponds roughly to where the tank insides are free of gas most of the time, exposed to the atmosphere (and hence, water). Assuming the stuff takes the shortest path.
                      Was mostly mid and upper section. I agree, as long as there is fuel i think it does its part to prevent rust...i know in the summer months condensation happens above the fuel line. Thats why with every bike i owned i always had the tank full.

                      Comment

                      • Fjbj40
                        Forum Sage
                        • Oct 2012
                        • 1221
                        • Dartmouth Nova Scotia

                        #26
                        Do yourself a favour, drill out the spot welds that hold on the emblems on the fuel tank. I can pretty much guarantee you the rust under there is close to perforation state. I have stripped multiple tanks and also removed them. After blasting there were holes.

                        It sucks if you don't and the tank leaks after you refinish it.

                        You are making great time so far!
                        1978 Gs1085 compliments of Popy Yosh, Bandit 1200 wheels and front end, VM33 Smoothbores, Yosh exhaust, braced frame, ported polished head :cool:
                        1983 Gs1100ESD, rebuild finished! Body paintwork happening winter 2017:D

                        I would rather trust my bike to a technician that reads the service manual than some backyardigan that THINKS HE KNOWS how to fix things.

                        Comment

                        • NickyGS750

                          #27
                          Originally posted by roeme
                          Wait, these carbs haven't even seen an ultrasonic? They look hella nice.
                          Nope, not yet... forgot to mention after the soda blast they will get ultrasonic for good measure.
                          Yup simple green cleaner is the best... for my anyways haha

                          Comment

                          • NickyGS750

                            #28
                            Originally posted by Fjbj40
                            Do yourself a favour, drill out the spot welds that hold on the emblems on the fuel tank. I can pretty much guarantee you the rust under there is close to perforation state. I have stripped multiple tanks and also removed them. After blasting there were holes.

                            It sucks if you don't and the tank leaks after you refinish it.

                            You are making great time so far!
                            Yes thats part of the plan, lots to always mention... i appreciate it, lots of fun getting this done!

                            Comment

                            • roeme
                              Forum Sage
                              Past Site Supporter
                              • Jul 2015
                              • 1206
                              • Switzerland

                              #29
                              Originally posted by Fjbj40
                              Do yourself a favour, drill out the spot welds that hold on the emblems on the fuel tank. I can pretty much guarantee you the rust under there is close to perforation state. I have stripped multiple tanks and also removed them. After blasting there were holes.

                              It sucks if you don't and the tank leaks after you refinish it.

                              You are making great time so far!
                              This sounds like an issue I might be up against soon; so: Spot welds holding emblems? Could you maybe provide pictures on where/what/how?

                              Edit: not necessarily in this thread, don't want to detract from Nicky's fine work log
                              #1: 1979 GS 550 EC "Red" – Very first Bike / Overhaul thread        New here? ☛ Read the Top 10 Newbie mistakes thread
                              #2: 1978 GS 550 EC "Blue" – Can't make it a donor / "Rebuild" thread     Manuals (and much more): See Cliff's homepage here
                              #3: 2014 Moto Guzzi V7 II Racer – One needs a runner while wrenching
                              #4: 1980 Moto Guzzi V65C – Something to chill

                              Comment

                              • NickyGS750

                                #30
                                Originally posted by roeme
                                This sounds like an issue I might be up against soon; so: Spot welds holding emblems? Could you maybe provide pictures on where/what/how?

                                Edit: not necessarily in this thread, don't want to detract from Nicky's fine work log
                                I got you!
                                Circled in red... just drill them out (carefully!) And itll come right off

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