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    Camshaft swap

    Can you install a 1983 GS 750 cam into a 1980 GS 750 if you use the cam chain gear from the 1980?
    Thank you?

    #2
    Originally posted by GS750BOB View Post
    Can you install a 1983 GS 750 cam into a 1980 GS 750 if you use the cam chain gear from the 1980?
    Thank you?
    compare the part numbers
    "Only fe' collected the old way, has any value." from His Majesty O'Keefe (1954 film)
    1982 GS1100G- road bike, body, seat and suspension modded
    1990 GSX750F-(1127cc '92 GSXR engine) track bike, much re-engineered
    1987 Honda CBR600F Hurricane; hooligan bike, restored

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      #3
      What model 83 750? if and E or ES, I'm thinking not, as that engine is different. If the 83 is an S or T, then maybe. A little research shows that the Exhaust Cams are the same, but the Intake Cams are different, but I don't know how different.

      The other thing to consider, and I'm not experienced in this, is: Aren't the cams bored to go in a specific engine? I mean cams from same year/model engines should fit, but didn't they bore each engine's cam journals for the specific set of cams that were going in the head? That's just my, very likely wrong, idea from something I believe I've read.

      83T - I - 12700-45810
      83T - E - 12700-45820

      80E - I - 12700-45830
      80E - E - 12700-45820

      83E - I - 12711-31300
      83E - E - 12721-31300
      Last edited by Rich82GS750TZ; 08-27-2021, 10:09 AM.
      Rich
      1982 GS 750TZ
      2015 Triumph Tiger 1200

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

      Comment


        #4
        Originally posted by Rich82GS750TZ View Post

        The other thing to consider, and I'm not experienced in this, is: Aren't the cams bored to go in a specific engine? I mean cams from same year/model engines should fit, but didn't they bore each engine's cam journals for the specific set of cams that were going in the head? That's just my, very likely wrong, idea from something I believe I've read.
        you are getting mixed up with cams and cam caps, it is the cam caps that are bored to the head and should always be used as a set.
        i cannot help with which cams you require.
        The big guy up there rides a Suzuki (this I know)
        1981 gs850gx

        1999 RF900
        past bikes. RF900
        TL1000s
        Hayabusa
        gsx 750f x2
        197cc Francis Barnett
        various British nails

        Comment


          #5
          Originally posted by fastbysuzuki View Post
          you are getting mixed up with cams and cam caps, it is the cam caps that are bored to the head and should always be used as a set.
          i cannot help with which cams you require.
          Got it. That makes much more sense. So there should be no issues swapping cam shafts between like engines, just be sure to keep the cam caps with the head in which they were originally bored.
          Rich
          1982 GS 750TZ
          2015 Triumph Tiger 1200

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

          Comment


            #6
            Originally posted by Rich82GS750TZ View Post
            Got it. That makes much more sense. So there should be no issues swapping cam shafts between like engines, just be sure to keep the cam caps with the head in which they were originally bored.
            yes the caps are fitted with markings so they go back in the correct places it shows it in the workshop manual
            The big guy up there rides a Suzuki (this I know)
            1981 gs850gx

            1999 RF900
            past bikes. RF900
            TL1000s
            Hayabusa
            gsx 750f x2
            197cc Francis Barnett
            various British nails

            Comment

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