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520 vs. 530 Chain

Discussion in 'The Garage' started by lakeview, Jul 26, 2019.

  1. lakeview

    lakeview XS650 Guru Top Contributor XS650.com Supporter

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    On my '77 "cafe" project, the P. O. had comissioned a fancy braced swing arm. I decided to use it and all was fine on the right side as to clearances, until I went to the chain side. Using standard 530 Chain, there is significant interference front the swing arm rubbing on the chain. Everything is tightened up and axle is equally adjusted both sides.
    In my view switching to a 520 chain, only 1/8th inch narrower would not provide the clearance needed, plus switching sprockets and chain are not really in this bike's budget and I have a stock swing arm to use anyway.
    Anybody see any easy way of getting another quarter inch of clearance other than grinding down the inside of the brace?
     
    halfmile and MaxPete like this.
  2. 5twins

    5twins XS650 Guru Top Contributor

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    I think the only fix is to re-work the brace, move it out farther on that side. An obvious fabrication FUBAR, lol. You would think that should be a very important dimension to check/verify during fabrication.
     
  3. mrtwowheel

    mrtwowheel Honda Etched On Brain Top Contributor

    In the 530 size chain, different brands/models are different widths, same for the 520. You could shop around for the thinnest width chain. Non-Oring chains are usually thinner than Oring chains. I don't think that difference is gonna help you. But then, maybe the builder had a specific chain planned for that swingarm.

    Scott
     
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  4. delagem

    delagem XS650 Addict

    If it were mine, I'd put a honkin' big screwdriver in there, and pry that brace away about 1/4". I'd put a piece of cut pipe or something to pry against, to prevent flattening/damaging the swingarm or brace. And put a block on the other side while prying, to keep the entire brace on the far side from shifting/bending in while prying. And frankly, I'd bet that's what my welding shop would do, too, if I brought it to them.

    But I'm an admitted hack.

    Kewl looking brace!
     
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  5. MaxPete

    MaxPete Life with Lucille...I suggest, she decides. Top Contributor XS650.com Supporter

    What about using a smaller rear sprocket....?
     
    delagem likes this.
  6. TwoManyXS1Bs

    TwoManyXS1Bs BBQ Hunter Top Contributor

    I'd remove the rear wheel, bolt in a pipe/spacer to maintain axle plate width and alignment. Then use my porta-power to spread the offending tube.
    PortaPower.jpg

    Typical frame straightening routine...
     
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  7. mrtwowheel

    mrtwowheel Honda Etched On Brain Top Contributor

    I used a porta-power in the body shop when I was a young'un. You can move anything with one of those. The auto stores should, but don't, offer them in their loan-a-tool programs.

    Scott
     
    Gator xs2, halfmile, Mailman and 2 others like this.
  8. Jim

    Jim Beyond the edge, is the unknown. Here be Dragons Top Contributor XS650.com Supporter

    Yeah... what 2M said. 'Cept you don't need all that fancy equipment. Got a 1 ton hydraulic jack?

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  9. lakeview

    lakeview XS650 Guru Top Contributor XS650.com Supporter

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    I first "dressed" the weld that seemed a bit bulky with a grinder and cleared up about a quarter inch. Refitted, a bit better but not right.
    Next, my bottle jack was 9 inches tall and too big for this job, so went to the scissor jack. This effort got a bit more clearance but still no joy.
    20190726_171112-1.jpg
    I had this ready for my stalled '74 rebuild, had already wrestled fresh bushings into it and added the 5Twins recommended grease fitting so I will expect I will switch over to it in the morning.
    There will be cooler days when the flies aren't biting to fix the other guy's mod.
     
  10. lakeview

    lakeview XS650 Guru Top Contributor XS650.com Supporter

    And thanks for the interest and replies. I had been doing well without resorting to brute force that I almost forgot I have big hammers and prybars.
    Sprockets now are 17/34 and don't really want to go to the 32 sitting on the bench and don't think its smaller diameter will quite carry the day.
     
    Last edited: Jul 26, 2019
  11. Mailman

    Mailman Hardly a Guru Top Contributor

    Oh dang it! I missed the party. What the heck , I’m putting this here anyways!

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    Gator xs2, gggGary, delagem and 4 others like this.
  12. MaxPete

    MaxPete Life with Lucille...I suggest, she decides. Top Contributor XS650.com Supporter

    If in doubt...hit it again, and with feeling this time!

    Pete
     
  13. halfmile

    halfmile XS Builder Top Contributor XS650.com Supporter

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    The swingarm brace is not as easy as it looks. The first one I built the main loop was too long and too narrow. With the suspension fully extended the front of the loop would hit the lower cross member. Bent up another loop and shortened the front and vertical braces 1/2". The rear of the loop had to follow the outside edges of the swingarm. The left side middle vertical brace had to curve out from the swingarm to the loop. Long story short a 20 foot stick will make one usable 42" loop and braces eventually. The last pics are of the mono shock conversion and the loop had to be that short to clear the dog bone. Good luck with your build.:thumbsup:
    Swing Arm Brace 003.JPG Swing Arm Brace 004.JPG Chrome -Powdercoat 004.JPG No Theme Build 8-14-18 001.JPG No Theme Build 8-14-18 003.JPG No Theme Build 8-14-18 007.JPG No Theme Build 8-14-18 008.JPG
     
  14. lakeview

    lakeview XS650 Guru Top Contributor XS650.com Supporter

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    Half mile, thanks for showing a usable braced swing arm. The P O said he had paid $400.00 for the one pictured, too bad it was wrong. Comparing this one to your pics, the error is clear.
    Just finished installing a stock one with new bushings, through bolt and pivot tube.
    Onward!
     
  15. MaxPete

    MaxPete Life with Lucille...I suggest, she decides. Top Contributor XS650.com Supporter

    Too bad - that bike swing arm really work on that bike IMO - at least aesthetically...
     
    lakeview likes this.
  16. fredintoon

    fredintoon Fred Hill, S'toon. Top Contributor

    Hi lakeview,
    Chop out the short vertical tube and replace it with a piece of flat bar.
     
    Last edited: Jul 28, 2019
  17. gggGary

    gggGary Stop that! Top Contributor XS650.com Supporter

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  18. flyerdon

    flyerdon XS650 Enthusiast

    Swingarm length and attitude are critical to the handling and stability of the motorcycle and manufacturers try a lot of dimensions before they finalize any critical component. Changing the wheelbase (because the swingarm has been shortened or lengthened) by even 1/2 inch can have quite an effect on the bike's handling so I'd be careful when making changes to it.
     
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  19. lakeview

    lakeview XS650 Guru Top Contributor XS650.com Supporter

    Cue pic of 'Busa with extended s/a.
    lol
     
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  20. gggGary

    gggGary Stop that! Top Contributor XS650.com Supporter

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