Page 6 of 7 FirstFirst ... 4567 LastLast
Results 51 to 60 of 63

Thread: Frame bracing, boxing vs tubing.

  1. #51
    Join Date
    Jul 2009
    Location
    New Zealand
    Posts
    3,447

    Default

    Quote Originally Posted by kochic View Post
    I was planning a V between exhaust 2 and 3. Is this what you are talking?
    Space is really thigh with a 1 5/8 header in the way.
    Marc

    Attachment 62036
    My mistake. In the side on picture I could not see the crosstube. A vee is nice but all I did was a pair of triangular gussets below the crosstube about 50mm on a side - and with the unwelded side folded up to a 10mm lip. Made in 2mm sheet. Light and stiff.

  2. #52
    Join Date
    Nov 2008
    Location
    St-Jean-de-Matha,Quebec
    Posts
    1,401

    Default

    Quote Originally Posted by GregT View Post
    My mistake. In the side on picture I could not see the crosstube. A vee is nice but all I did was a pair of triangular gussets below the crosstube about 50mm on a side - and with the unwelded side folded up to a 10mm lip. Made in 2mm sheet. Light and stiff.

    Thanks, I will do this today,
    Marc
    AIR COOLED MONSTERS NEVER DIE
    1978 GS1000C X2
    1978 GS1000E
    1979 GS1000S
    1979 gs1000

  3. #53
    Join Date
    Nov 2008
    Location
    St-Jean-de-Matha,Quebec
    Posts
    1,401

    Default

    I made these two brace.
    Marc

    CIMG6034.jpg
    AIR COOLED MONSTERS NEVER DIE
    1978 GS1000C X2
    1978 GS1000E
    1979 GS1000S
    1979 gs1000

  4. #54
    Join Date
    Nov 2008
    Location
    St-Jean-de-Matha,Quebec
    Posts
    1,401

    Default

    on the GS,
    Marc
    CIMG6036.jpg
    AIR COOLED MONSTERS NEVER DIE
    1978 GS1000C X2
    1978 GS1000E
    1979 GS1000S
    1979 gs1000

  5. #55
    Join Date
    Aug 2012
    Location
    Columbus, Ohio
    Posts
    3,601

    Default

    Looking great Mark & Spiff!
    Got any more photos or ideas on how to better brace the ignition coil & front tank mounting areas? While still being able to fit in the coils & stock tanks?
    This is one big thing on my agenda for my GS400 canyon carver / track bike build, as those frames & 550's are especially very lacking in that area.

    Thanks for posting up, got me excited to tackle that bike build sooner than later!
    I've been sidetracked all year, end of August thru early October several twisty road GS750 trips to the mountains but more & more heavily into dirtbike woods/mountains trail riding & probably ending that by Dec 15th until mid March.
    Last edited by Chuck78; 11-28-2020 at 08:47 PM.

    '77 GS750
    920cc, 4-1, GS1100E swinger, 18"rims, Fox Factory Shox, twinpot dual disc, VM29's, Yoshi cams
    '99 Kawasaki KDX220 rugged terrain ripper
    '74 Rickman VR250MX
    PROJECTS:
    '77 Suzuki PE250 Pure Enduro trail beast, ported, Wiseco, TüBliss, Fox Factory Shox/RaceTech
    '76 Rickman CR GS1000-1120cc roadracer, Yoshi cams&4-1, RF900R fork, Works ProRacers
    '79 GS425 489cc, GR650 cams, GS650 fork, twinpot discs, DID rims, GS1100E swinger, Fox Factory Shox
    '77 GS550 650-740cc susp/brake mods

  6. #56
    Join Date
    Nov 2008
    Location
    St-Jean-de-Matha,Quebec
    Posts
    1,401

    Default

    Thanks, I will need to buy Dyna coils to make new brackets, the weld crack on the stock coils brackets when racing.The headstock is really well braced from Suzuki on the 1000.Maybe just copy it on the 400.
    Marc
    AIR COOLED MONSTERS NEVER DIE
    1978 GS1000C X2
    1978 GS1000E
    1979 GS1000S
    1979 gs1000

  7. #57
    Join Date
    Nov 2008
    Location
    St-Jean-de-Matha,Quebec
    Posts
    1,401

    Default

    After trying a set of Dyna coils, I just welded the underside of both stock coils brackets.Usually they crack around the spot weld.
    Marc
    AIR COOLED MONSTERS NEVER DIE
    1978 GS1000C X2
    1978 GS1000E
    1979 GS1000S
    1979 gs1000

  8. #58
    Join Date
    Jan 2014
    Location
    British Isles SE
    Posts
    1

    Default

    Quote Originally Posted by kochic View Post
    on the GS,
    Marc
    CIMG6036.jpg

    Impressive fabrication skills Marc, this thread has made for excellent reading & viewing, thank you all!

    I'm off to see if there's a full build thread for your bike!

    Cheers

    Matt

  9. #59
    Join Date
    Jul 2014
    Posts
    2,623

    Default

    Good job, I do have a few things to mention I do a lot of fabrication. The factory frame does have some stress because initial bending/welding during manufacturing. All the welding you have done will introduce additional stress. If you have access to getting your frame stress relieved after the fabrication is complete it will enhance the strength. It is basically placed in a kiln/oven stress in welds is released when the steel reaches 550 to 650C, and held there for one to two hours. After that the frame is totally free of oil and it is a good time to have it powder coated. If you use aluminum for engine mounts I would use 2400, or 7500 series aluminum, it is about as strong as mild steel. I like to use 6AL4V Titanium for engine mounts. This alloy is about as strong as chromoly steel, and its weight is only slightly heavier than aluminum. The 6AL4V Titanium is almost twice as strong as pure Titanium. You can buy scraps from aerospace manufacturing of 6AL4V Titanium on ebay, otherwise the price is obscene. Any bolt on structural parts you can make out of titanium will lighten and strengthen the bike. And the strange gray color of titanium looks cool, and stands out. It looks great so far, good luck with the project.
    1981 GS1100E
    1982 GS1100E



    "It is the mark of an educated mind to be able to entertain a thought without accepting it." Aristotle


  10. #60
    Join Date
    Mar 2021
    Location
    Lebanon, TN
    Posts
    40

    Default

    Quote Originally Posted by Spiff View Post
    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.
    I did this bracing on mine over a decade ago, so specific memory a LITTLE fuzzy. I think B, C, and E are 1/4 plate steel. It's essentially a gusset. I also had to delete tubing A and replace with a gusset of plate to allow the tank to still mount. Test fit exhaust for F, have to make sure your header will fit.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •