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Featherbed Fork Stop??

Discussion in 'Other Norton Motorcycles' started by johnod, Jan 5, 2017.

  1. johnod

    johnod

    Joined:
    Oct 27, 2016
    Today we jigged up the frame and checked to see what might be bent or twisted, and it all is pretty good thankfully.

    I did notice, on the neck of frame ( bottom left) above the fork stop there is some sort of, looks like another stop, but doesn't seem to do anything .
    Can someone tell me what that might be?

    Also there seems to be another stop of some sort on the top of neck on the right side , thought this might be for a steering lock , is it?

    Thanks
     
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  2. texasSlick

    texasSlick VIP MEMBER

    Joined:
    Jan 2, 2013
    Pictures would help.

    On my FB, the fork stop is a 1/8 inch plate bolted to the gussets where the frame tubes come together near the bottom of the steering yoke.

    Slick
     
  3. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
    it depends which f/b frame you have, a plate could be made to bolt on or the stops could be welded on.
     
  4. dynodave

    dynodave

    Joined:
    May 28, 2003
    Early FB thru 1963 = bolt on stop & cross bar
    no data for 64-65
    66-end = welded on stop & cross bar

    Curious if the bolt-on VS welded-on rear frame cross bar happened at the same time?
     
  5. johnod

    johnod

    Joined:
    Oct 27, 2016
    Mine is welded on, and looks factory.
    What is the crossbar?
     
  6. dynodave

    dynodave

    Joined:
    May 28, 2003
    Round cross tube across the frame above the swing arm, has upper engine plate mounting points. Welded on late model slimline, through bolted (removeable) on early slimline FB
     
  7. Johnnymac

    Johnnymac VIP MEMBER

    Joined:
    Oct 8, 2011
    Hey Slick. Do you have a picture of your fork stop setup? I'm revisiting my Atlas and was hoping that you might be able to help me out. Thanks!!!
     
  8. texasSlick

    texasSlick VIP MEMBER

    Joined:
    Jan 2, 2013
    Will do Johnny. Give me a day or two ..... I am at the ranch, and the Atlas is at my shop in town.

    Slick
     
  9. Johnnymac

    Johnnymac VIP MEMBER

    Joined:
    Oct 8, 2011
    Thank you!!
     
  10. bad_friday

    bad_friday

    Joined:
    Mar 23, 2012
    Mine is bolted on. No 119 133 from 1966.


    Fritz
     
  11. dynodave

    dynodave

    Joined:
    May 28, 2003
    Yes 119133 is quite late 66... 67 starting is shown as 119760
    Mine what?
    Fork stop AND cross bar?
    Have you examined the frame for modification and originality of components?
    What is the date stamp on the front end brace? Has it been obliterated or removed? What was the original series 20=atlas 18=650?
    curious situation indeed.
     
  12. texasSlick

    texasSlick VIP MEMBER

    Joined:
    Jan 2, 2013
    @Johhnymac

    Here you go. For whatever my photography is worth. The pics show how badly my frame needs restoration!!

    upload_2018-4-2_12-42-22.jpeg

    The SHCS are not original. The steel plate is 1/8 inch thick. The plate angles away from the gusset plates by 35 deg. as near as I can measure without removing. The upper plate with the lugs rotates with the steering spindle. The stop plate and upper plate have approx. 5/16" dia holes that allow a padlock to lock the forks full left. I used a padlock for many years until it succumbed to vibration, giving me a fit to get it unlocked. The SHCS were for an extra modicum of security, since the lock could be defeated by unbolting the stop plate.

    Here is a full side view where you can see the 35 deg. angle better.

    upload_2018-4-2_12-51-35.jpeg

    If you need to fab up a stop plate, I can remove mine, trace it, and snail mail the copy to you.

    Slick
     
  13. kernel65

    kernel65

    Joined:
    Nov 11, 2012
    My '65 is a weld on. 1147XX
     
  14. bad_friday

    bad_friday

    Joined:
    Mar 23, 2012
    The fork stop is bolted on.
    What's the «cross bar» and what's the «front end brace»?

    Fritz
     
  15. dynodave

    dynodave

    Joined:
    May 28, 2003
    The cross bar (sorry my term) is the rear engine/trans mount with the two tabs. It is through bolted (on early) rather than welded (on later).
    The front end brace is the tab on the steering neck where you bolt the engine/head steady bar. The head steady bar attaches to the stud on top of the head. The front end brace originally has stamped digits for month and year of manufacture in the top edge.
     
  16. robs ss

    robs ss VIP MEMBER

    Joined:
    Aug 16, 2016
    Yeah - I agree Dave
    Although the term "head-steady" on the featherbed, according to my Dad, was a misnomer.
    It was actually a retrofit to compensate for the one significant flaw in Rex McCandless's featherbed concept - it actually was an additional support for the steering head. (maybe the original Commando frame designers weren't listening?)
    The one? weakness in the featherbed design is where the rising tubes from the cradle cross over the horizontal tubes from the lower headstock.
    If not braced by the "head-steady" the frame will surely fail from braking induced fatigue - normally the rising tubes fail
    This maybe explains the relatively large number of featherbeds showing signs of repair in this area?
    Cheers
    Rob
    Below shows the stamped brace with the date stamp you mention (taken when sandblasting my 500) together with a shot of the "cross bar" - Norton spares list called it "Cross tube rear engine fixing" - I like your term better! The two, single bolt lugs are for the upper rear engine plates - the single, two bolt lug is for the rear mudguard (fender)
    Cheers
    Rob
    IMG_1257.JPG IMG_1266.JPG
     
    Last edited: Apr 3, 2018
    dynodave likes this.
  17. Johnnymac

    Johnnymac VIP MEMBER

    Joined:
    Oct 8, 2011
    Thank you so much!!! Looks like I'm going to have to custom rig something. I have no tabs on the bottom of my tree. Here is a picture of my Atlas. zySEtBqBRJWk4iIuIbkyow.jpg
     
  18. texasSlick

    texasSlick VIP MEMBER

    Joined:
    Jan 2, 2013
    @Johhnymac

    It looks to me like you will have to put the tabs on a custom designed, bolt-on stop plate.

    Slick
     
    Last edited: Apr 3, 2018
  19. kernel65

    kernel65

    Joined:
    Nov 11, 2012
    Mac, you may have a welded on fork stop yoke mounted to a bolt on frame. I would look at mine to confirm but the bikes are still in their moisture bags. Can't find any good pics on the internet to confirm.

    Scott
     
  20. Johnnymac

    Johnnymac VIP MEMBER

    Joined:
    Oct 8, 2011
    Thanks Scott! I think you're right. Here is the one on my other Atlas. It is correct. 5trbKxwKTYqu0+oE+UaXgA.jpg
     
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