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Thread: Frame bracing, boxing vs tubing.

  1. #1
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    Default Frame bracing, boxing vs tubing.

    Hi again, been a few years since I was last on this forum, still haven't finished my gs but hoping to get there now. So tomorrow I'm starting to brace my frame.
    I've been reading this; https://oldskoolsuzuki.info/archives/315
    And I see it's a 60x20 1mm box steel that's recommended on the B C and E bracing, but what if I can't find that? Can i use steel tube instead? Or make a box with 1mm steel sheet?
    I see both boxing and tubing being used online but I don't know about the pros and cons, I'm sure anything is better than nothing at this point but I wanna do it proper when I'm first gonna do it.

    And if anyone is wondering why I'm doing this I'm fitting a sv1000 front fork and a bandit 1200 rear with öhlins shocks so I think it's for the better.

  2. #2
    salty_monk's Avatar
    salty_monk is offline Forum LongTimer GSResource Superstar
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    Default

    You can fold those box sections out of sheet. No reason why not. look at the plane of the forces. You could also just use a single thicker plate and get most of the same benefit with a lot less hassle (that's what Suzuki do as stock on where they brace the frame)....

    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

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  3. #3
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    I used a mixture of round and rectangular tubing when I braced & monoshocked my frame. I can say it definitely reduced the "hinged in the middle" feeling of the flexy stock frame. It's never going to be as stiff as say a modern sportbike frame, but is definitely an improvement over stock.


  4. #4
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    I used tube, 16g plate and one piece of tube between the swingarm pivot where I added another engine mount.
    Its a work in progress.
    Marc
    CIMG5567.jpg
    Last edited by kochic; 03-09-2020 at 08:42 PM.
    AIR COOLED MONSTERS NEVER DIE
    1978 GS1000C X2
    1978 GS1000E
    1979 GS1000S


  5. #5
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    these are made with 16g plate.
    Marc
    CIMG5569.jpg
    Last edited by kochic; 03-09-2020 at 08:41 PM.
    AIR COOLED MONSTERS NEVER DIE
    1978 GS1000C X2
    1978 GS1000E
    1979 GS1000S


  6. #6
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    under the tank.
    Marc
    CIMG5529.jpg
    AIR COOLED MONSTERS NEVER DIE
    1978 GS1000C X2
    1978 GS1000E
    1979 GS1000S


  7. #7
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    another picture.
    Marc
    CIMG5524.jpg
    AIR COOLED MONSTERS NEVER DIE
    1978 GS1000C X2
    1978 GS1000E
    1979 GS1000S


  8. #8
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    Aluminium engine mount, more than 1lb lighter.
    Sorry for the small pictures, I know how to post bigger pics.
    Marc
    CIMG5591.jpg
    AIR COOLED MONSTERS NEVER DIE
    1978 GS1000C X2
    1978 GS1000E
    1979 GS1000S


  9. #9
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    Thanks for the replies, I think I'll just fold some sheet metal for the box sections B and C and use tubing for the rest.

    Made the front one today


  10. #10
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    Cool thread!
    Just like to know if any of these bikes were built for racing?
    Because reducing weight is important for race bikes.
    Thanks.
    "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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