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Norton P11 center stand

Discussion in 'Norton P11 Motorcycles' started by p400, Aug 10, 2018.

  1. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Any details on this centerstand dimensions or fastening?

    Old man, who cant tunafish, wants to know!

    Looks like an adaption of a center stand off of another Norton.



    Auction  (5).JPG Auction  (6).JPG
     
    Last edited: Aug 10, 2018
  2. jerrykap

    jerrykap VIP MEMBER

    Joined:
    Jul 23, 2014
    1st one I've ever seen...I'm thinking homemade? Or possibly modified from another English motorbike? It also looks to have a nice strobe timing feature on the outside of the primary.
     
  3. PopsRacer

    PopsRacer

    Joined:
    Aug 12, 2018
    If you are still curious, I’ll let you know next time I have it out. It’s my new project now.

    I keep it in a relative’s garage right now because I don’t have the work/storage space.
     
  4. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    we are wanting to know, thanks
     
  5. PopsRacer

    PopsRacer

    Joined:
    Aug 12, 2018
    Here's a few as promised:

    https://photos.google.com/album/AF1QipNdxAZTVIHwdrRMTMaHDXuGJ7WkBgo1Esiuiq5P

    I also recall the auctioneer saying something about a "factory racing" frame or something. Could just be a sales pitch.

    I'm still learning about the whole bike because I've never seen one (I recently looked into one of my old MC books from when I was a kid, and there's no P11 anywhere in the Norton sections)

    But the mount looks solid to me.
     
    jerrykap likes this.
  6. p400

    p400 VIP MEMBER

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    Jul 14, 2014
    this linked photo (or for that matter anybody's linked photos) does not work for me, can you post the photos some other way please?

    The P11 chassis is, according to my poor recall, a factory racer G85CS chassis....chrome moly/brazed construction.

    I enjoy the blank stare from motorcycle people when I report "it is a Norton P11" .

    video1.jpg
     
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  7. jerrykap

    jerrykap VIP MEMBER

    Joined:
    Jul 23, 2014
    Photo link not working...please try something else.

     
  8. PopsRacer

    PopsRacer

    Joined:
    Aug 12, 2018
    p400 likes this.
  9. elefantrider

    elefantrider VIP MEMBER

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    Apr 6, 2013
    Somebody spent a lot of time fabricating that. Looks all custom and good.
     
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  10. p400

    p400 VIP MEMBER

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    Jul 14, 2014
    Excellent photos, thank you for this photo posting.

    If you take this apart, we need more photos and dimensions if possible.
    Does anyone recognize the center stand, as it looks a stock center stand off another bike??
     
  11. mdt-son

    mdt-son

    Joined:
    Jan 19, 2012
    Seems to be an angle section running across the frame to which 4 tabs / lugs are welded which holds two pivot bolts. The outer lugs appear to be threaded. They are L-shaped, thus supporting the angle section under the frame rails. The forward facing part of the angle section is fitted with two tabs/lugs which are clamped by the lower gearbox bolt.
    Neat arrangement, apparently avoiding the frame to be altered.

    The centerstand including the horizontal tubes which attach to the pivot bolts appear to be factory made. The rugged design suggests it came off a heavy bike. I believe the donor was a Suzuki GS750 and the OEM stand was trimmed for lever etc.

    -Knut
     
    Last edited: Sep 15, 2018
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  12. p400

    p400 VIP MEMBER

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    Jul 14, 2014
    I am looking at 1980 Suzuki GS550 centerstand. Thanks to mtd-son

    SuzukiGS550Centerstand1.jpg
     
  13. PopsRacer

    PopsRacer

    Joined:
    Aug 12, 2018
    This is all cool stuff!

    It looks like a solid stand.
     
  14. p400

    p400 VIP MEMBER

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    Jul 14, 2014
    I picked up a GS550 stand off ebay for $1 +$10 ship.
    Looks promising as a duplicate of the one in Pops pictures....with some mods, pics later.

    Looks a tad too tall and side arm needs to be smaller as pictured.

    dimension at top , outside both tubes is 6" in width.
    Spring hook , cross tube, foot style look same.

    in this stock form it weighs 1550 gms

    SuzukiGS550Centerstand2.jpg
     
    Last edited: Sep 19, 2018
  15. p400

    p400 VIP MEMBER

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    Jul 14, 2014
    Image1.jpg
     
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  16. elefantrider

    elefantrider VIP MEMBER

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    Apr 6, 2013
    Looks like it is bolted to an additionally added round or square bar with tabs welded to the bottom of the frame tubes? Maybe an old Suzuki subframe piece?
     
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  17. p400

    p400 VIP MEMBER

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    Jul 14, 2014
    Looking at the photos from pops, it appears to me to be a single flat bar (maybe 1/8 thick) that has 6 tabs welded to it, seven tabs if you include spring tab mount.

    Four tabs down to hold the stand, two tabs up to allow bolting to the bottom trans thru bolt, requiring a longer thru bolt.

    I see 90 degree tabs at the outside bottom to keep this assembly from rotating up, with bike weight, but I don't see yet what is keeping the whole assembly from rotating down.
     
  18. mdt-son

    mdt-son

    Joined:
    Jan 19, 2012
    The bar is obviously an angle section, not a flat bar.

    According to my calculations, there are positive contact forces between the rails and the "90 degree tabs" when center stand is lowered (bike parked) as well as center stand raised (weight of stand balanced by the spring force). Thus, the assembly will not rotate down.

    Obviously I made a few reasonable assumptions wrt. geometry based on the images in this thread. If anyone is interested in the calcs, please pm me.

    -Knut
     
  19. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    I ordered a spring and bushings from a Suzuki supplier.

    Here is a clearer photo of the bottom view.

    Other photos seems to show an "up" stop mounted on the right side with a rubber bumper.


    Pops2.jpg
     
    Last edited: Sep 24, 2018
  20. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Is this a center stand "up" stop ?


    Pops3a.jpg