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    #1

    Aluminum Swingarm Conversion

    What's going to be the easiest way to drill my frame out for the conversion?
    Tags: None
    #2
    There was a lot of discussion on this a while back... plenty of info in the archives if you can find it

    Some did it by hand, others reamed it, others made adapters, others made a new plate & welded it etc etc.
    1980 GS1000G - Sold
    1978 GS1000E - Finished!
    1980 GS550E - Fixed & given to a friend
    1983 GS750ES Special - Sold
    2009 KLR 650 - Sold - gone to TX!
    1982 GS1100G - Rebuilt and finished. - Sold
    2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!

    www.parasiticsanalytics.com

    TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

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      #3
      I just went crazy, drilled the frame out and got lucky. But I reckon the safest way (without high tech gear) is to tap the holes to 16mm and then ream. This will give you a better chance to keep it all aligned.
      -Mal

      "The only reason for time is so that everything doesn't happen at once." - B. Banzai
      ___________

      78 GS750E

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        #4
        or get the correct size pivot bearing spacers so you can use the stock pivot bolt
        1978 GS1085.

        Just remember, an opinion without 3.14 is just an onion!

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          #5
          Originally posted by Agemax View Post
          or get the correct size pivot bearing spacers so you can use the stock pivot bolt
          Someone did that fairly recently didn't they. That sure would be the easiest way.
          -Mal

          "The only reason for time is so that everything doesn't happen at once." - B. Banzai
          ___________

          78 GS750E

          Comment

            #6
            I just drilled the frame out to the 20mm swingarm bolt that I needed to use the Bandit swingarm.
            I am a human drill press No all kidding aside It is not hard to get it straight when it has a pilot hole already.
            I wanted to use the larger bolt for the extra strength
            Last edited by stetracer; 06-18-2013, 06:30 PM.
            My stable
            84 GSX1100EFG-10.62 @ 125 mph 64'' W/B.
            85 GS1150-9.72@146mph stock W/B.
            88 GSXR1100-dragbike 9.18@139.92mph/5.68@118mph.
            98 Bandit 1200-9.38@146mph/6.02@121mph.
            90 Suzuki GS 1425cc FBG Pro Stock chassis 5.42@124mph
            06 GSXR750 10.44@135mph
            00 Honda elite 80 pit bike

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              #7
              What do you mean tap the hole to 16mm? Like a tap and die set?

              Comment

                #8
                Originally posted by Hone101 View Post
                What do you mean tap the hole to 16mm? Like a tap and die set?
                yes, tapping it to 16mm removes most of the metal in the hole,while still keeping it true, and making it much easier to ream out afterwards.
                1978 GS1085.

                Just remember, an opinion without 3.14 is just an onion!

                Comment

                  #9
                  Sounds like a winner for me! Thanks for all the ideas. Got tired of reading all the threads about the swap. Thanks again!

                  Comment

                    #10
                    Originally posted by Hone101 View Post
                    Sounds like a winner for me! Thanks for all the ideas. Got tired of reading all the threads about the swap. Thanks again!
                    BTW the 16mm hole will take the 1100E swinger pivot bolt, and that bolt is longer than the stock 750. You will need spacers or cut about 1" of new thread. The swinger is also a bit longer so you will need a couple of extra chain links, so.....this is a good time to convert to 530 chain & sprockets!
                    (If you do, don't forget to account for the longer swinger when calculating the number of new chain links.) I didn't
                    -Mal

                    "The only reason for time is so that everything doesn't happen at once." - B. Banzai
                    ___________

                    78 GS750E

                    Comment

                      #11
                      Broke my tap 3/4 of the way through but got it done. Took a new 120 Link 530 chain. Anyone doing a 1979 750 using an 83 GS1100 Swingarm the bolt does not need to be cut down shorter.

                      Comment

                        #12
                        Originally posted by Hone101 View Post
                        Sounds like a winner for me! Thanks for all the ideas. Got tired of reading all the threads about the swap. Thanks again!
                        LOL, you must have found my threads on this swap
                        sigpicMrBill Been a GSR member on and off since April 2002
                        1980 GS 750E Bought new in Feb of 1980
                        2015 CAN AM RTS


                        Stuff I've done to my bike:dancing: 1100E front end with new Sonic springs, 1100E swing arm conversion with new Progressive shocks installed, 530 sprockets/chain conversion, new SS brake lines, new brake pads. New SS fasteners through out. Rebuilt carbs, new EBC clutch springs and horn installed. New paint. Motor runs strong.

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