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Must have lost my mind, temporarily I hope!

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    Must have lost my mind, temporarily I hope!

    Cannot believe that I just agreed to buy another old bike. This one is a 1980 Honda CB750K with 19K on the speedo. Runs rough but has a new rectifier and battery. Cosmetically it is in fair condition. I guess now I have a winter project! Will post pics when I get it home this weekend. At least it has all the major parts. Anything that these old Hondas need checked out that other brands do not?
    Ron
    When I die, just cremate me and put me in my GS tank. That way I can go through these carbs, one more time!
    1978 GS750E - November 2017 BOTM
    1978 GS1000C - May 2021 BOTM
    1982 GS1100E
    1999 Honda GL1500SE

    #2
    http://www.cb750c.com/ is a good website for the DOHC Honda.
    A lot of crossover between the C, K and F models.

    Another great site for parts and info is https://www.motorcycleproject.com/

    A lot of those bikes had starter clutch issues.
    3 bolts under the left side cover that need re-tightening.
    Last edited by steve murdoch; 10-11-2018, 12:53 PM.
    2@ \'78 GS1000

    Comment


      #3
      Charging issues ( if not due to R/R issues ) will most likely be the rotor windings which are under the right side cover. Check wear marks on the brushes too. If the rotor is the issue once you OHM it out get ahold of Custom Rewind in Birmingham Alabama. Kirk did one for me and it was back within a week.
      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

      Comment


        #4
        This page with its links may be of use to you...


        Found these a while back and the Admin over on CB750C.com gave me permision to share. They are broke down in chapters for easier downloading. Later model addendums and specific wiring diagrams are at the bottom. 1979 through 1982 Honda CB750K/C/F/SC Service Manual U.S. version. Chapter 1...
        MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
        1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

        NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


        I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

        Comment


          #5
          Thanks for the info! The bike is "supposed" to have a new rectifier and has a new battery.....we will see when I pick it up tomorrow. I know that the pods are coming off and the stock airbox is going back on. The PO said he recently added the pods but did not change anything in the carbs??? Needs some work on the header (paint) and has a valve cover gasket leak, which will be replaced when the valves are adjusted anyway. As with any old "new" bike, I've got a long list of things to check before even attempting to get it out for a test ride! At least the price was right. Hopefully I will get it home with enough light to take some pictures to post.

          Thanks again for the info!
          Ron
          When I die, just cremate me and put me in my GS tank. That way I can go through these carbs, one more time!
          1978 GS750E - November 2017 BOTM
          1978 GS1000C - May 2021 BOTM
          1982 GS1100E
          1999 Honda GL1500SE

          Comment


            #6
            Finally got the winter project home. Here is a pic.IMG_0117.jpg

            Still cannot figure out why my pictures are always upside-down or sideways!!!!
            Ron
            When I die, just cremate me and put me in my GS tank. That way I can go through these carbs, one more time!
            1978 GS750E - November 2017 BOTM
            1978 GS1000C - May 2021 BOTM
            1982 GS1100E
            1999 Honda GL1500SE

            Comment


              #7
              Rich
              1982 GS 750TZ
              2015 Triumph Tiger 1200

              BikeCliff's / Charging System Sorted / Posting Pics
              Destroy-Rebuild 750T/ Destroy-Rebuild part deux

              Comment


                #8
                Looks like a good starting point, those are fetching good money these days.
                1980 Yamaha XS1100G (Current bike)
                1982 GS450txz (former bike)
                LONG list of previous bikes not listed here.

                These aren't my words, I just arrange them

                Comment


                  #9
                  Gotta de-rust the tank and then get her running good. The PO did not know anything about bikes and inherited it, so I got a deal...….I hope! Probably just gonna flip it, but who knows....4 bikes is not too many is it?
                  Last edited by 1978GS750E; 10-14-2018, 01:14 PM.
                  Ron
                  When I die, just cremate me and put me in my GS tank. That way I can go through these carbs, one more time!
                  1978 GS750E - November 2017 BOTM
                  1978 GS1000C - May 2021 BOTM
                  1982 GS1100E
                  1999 Honda GL1500SE

                  Comment


                    #10
                    Got the tank cleaned out today. Did a quick clean of the carbs, removing lots of rust! Cleaned the petcock. Put it all back together with an inline filter, just in case! Put the battery in it and...….."IT''S ALIVE"! Started right up and idled a little high but so far it looks like a deal! What I thought was a valve cover leak looks to be a tach cable leak. Got a couple days off work so I'm hopeful that I can get some more done to it. Going to get some of the ugly off it tomorrow. Anybody need some rusted crash bars? What about rusted highway pegs?
                    Ron
                    When I die, just cremate me and put me in my GS tank. That way I can go through these carbs, one more time!
                    1978 GS750E - November 2017 BOTM
                    1978 GS1000C - May 2021 BOTM
                    1982 GS1100E
                    1999 Honda GL1500SE

                    Comment


                      #11
                      What exhaust is on it.
                      Same as the GS line, some of the DOHC aftermarket systems are worth some good coin.
                      2@ \'78 GS1000

                      Comment


                        #12
                        It has a black Mac 4 into1 that needs some paint badly! My GS has the original exhaust so I will not be swapping those! Have to get the crash bar brackets(homemade) off, the airbox installed, and it needs a right rear turn signal bracket and a choke cable, then it will be back into almost stock form.
                        Ron
                        When I die, just cremate me and put me in my GS tank. That way I can go through these carbs, one more time!
                        1978 GS750E - November 2017 BOTM
                        1978 GS1000C - May 2021 BOTM
                        1982 GS1100E
                        1999 Honda GL1500SE

                        Comment

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