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Slimline vs Wideline?

Discussion in 'Other Norton Motorcycles' started by Atlas Commando, Dec 5, 2018.

  1. Atlas Commando

    Atlas Commando VIP MEMBER

    Joined:
    Feb 27, 2018
    At the risk of appearing like a complete dummy, how can I tell if my featherbed frame is a slimline or not? Is there a single quick measurement? I own a frame or two and would like to know what I have. Certainly not an urgent question....
     
  2. manx850

    manx850 VIP MEMBER

    Joined:
    Aug 15, 2012
    on a wideline the top rails are straight all the way to the back a wideline is waisted in the middle near the seat area so your legs do not feel so splayed out...........not sure what year that started......
     
  3. manx850

    manx850 VIP MEMBER

    Joined:
    Aug 15, 2012
    Possibly 1960?
     
  4. ashman

    ashman

    Joined:
    Jul 11, 2010
    I just went up into my shed and measured both of my Featherbed frames, on a Wideline on the top rails the narrow part where the rear of the tank sits is 10 1/2" wide and on a Slimline the top rails where the rear of the tank sits is 7 1/2" wide.

    Ashley
     
  5. nortonmews

    nortonmews

    Joined:
    Nov 20, 2015
    Hi
    Visually the rear suspension sub-frame tubes are straight on a wide-line but are curved on a slim-line.
    Regards,
    Graham
     
  6. ashman

    ashman

    Joined:
    Jul 11, 2010
    Yes and that to.

    Ashley
     
  7. ntst8

    ntst8 VIP MEMBER

    Joined:
    Feb 14, 2004
    1959 ES2's went wideline, presumably because the twins went slimline that year.
    Singles went slimline 1961 & 1962.
     
  8. gtiller

    gtiller VIP MEMBER

    Joined:
    Nov 5, 2012
    As per @nortonmews comment - the clearest difference is visually - the rear subframe being curved on a slimline, and angular on a wideline.

    Slimline:
    tumblr_nvozgfmJ071urreqlo1_1280.jpg

    Wideline:
    13_067201a.jpg

    1951 - introduction of the wideline featherbed on the twin dominator 88 - the rear subframe is bolt-up rather than welded
    1954 - introduction of the welded wideline
    1960 - introduction of the slimline featherbed

    1961 - introduction of the slimline featherbed on the single cylinder (you can spot this by the flat on the right side top frame rail, as they made some room for the rocker cover)
     
  9. Atlas Commando

    Atlas Commando VIP MEMBER

    Joined:
    Feb 27, 2018
    Thank You for all your replies. I've wondered about this for a very long time. I have 2 slimline frames in my attic, one of which is horribly butchered and will likely be scrapped. I bought an Atlas for $250 back around 1977 that was running but a cosmetic disaster. When I lifted off the tank I saw that somebody had chopped the top rails off and welded in a single tube, and then somebody sawed that off and re-welded some top rails back in. Neither welder knew what he was doing. I probably should have thrown it away decades ago. Maybe someone is interested in the back half of a slimline?
     
  10. gtiller

    gtiller VIP MEMBER

    Joined:
    Nov 5, 2012
    @Atlas Commando If there is still a frame number on the left side web, it's worth keeping your butchered frame as you (or someone else) may want replace the frame for a new one at some point.
     
  11. Atlas Commando

    Atlas Commando VIP MEMBER

    Joined:
    Feb 27, 2018
    In fact it does, and I have the province of Ontario title for it. Maybe worth something to somebody. But I do have some junk I need to finally let go, things like bent forks, bent rims, etc. My attic rafters could use a break.
     
    gtiller likes this.
  12. gtiller

    gtiller VIP MEMBER

    Joined:
    Nov 5, 2012
    Sometimes it's hard to let go!!!!
     
  13. robs ss

    robs ss VIP MEMBER

    Joined:
    Aug 16, 2016
    I think it's worth pointing out that up until the slimline was introduced there were no widelines, just featherbeds.
    The term wideline was introduced retrospectively to distinguish the older frames from the "new" slimlines.
    Cheers
    Rob