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NJB shocks

Discussion in 'Norton Commando Motorcycles (Classic)' started by DogT, Jun 18, 2010.

  1. DogT

    DogT VIP MEMBER

    Joined:
    Jan 20, 2009
    Got these last week and the hole in the shock mount looks to be about 12mm (about 15/32) and of course the mounting bolts for the shocks are 3/8". Norman said just use the middle plastic spacers over my 3/8 bolt to take up the slop. Doesn't seem like a stable arrangement to me. Anyone else have another option. I don't seem to be able to find any steel sleeves that will work without going to a machine shop and having them made.

    Opinions?

    [​IMG]

    Dave
    69S
     
  2. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004
    Those plastic adaptor spacer sleeves are often supplied with shocks, but I've never known anyone to say they had a problem with them, I've certainy used them before in various shock mounting applications without any problem.
     
  3. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    Those are exactly what I got. I just slipped the plastic sleeves over and installed. I don't anticipate any problems.
     
  4. DogT

    DogT VIP MEMBER

    Joined:
    Jan 20, 2009
    OK.

    Dave
    69S
     
  5. grandpaul

    grandpaul VIP MEMBER

    Joined:
    Jan 15, 2008
    I've used the plastic spacer sleeves on at least a half-dozen rebuilds, with zero issues noted.

    Hagons use the same spacers, by the way...
     
  6. Keith1069

    Keith1069

    Joined:
    Jan 10, 2005
    Just put NJB's on mine and yes I didn't like the plastic sleeves but so far OK. What I did notice is that my 69" and both little legs won't reach the ground now except on tiptoe! NJB's are a little longer than the Hagons but they do have 5 pre-load positions instead of the 3. Running on 2nd at the moment and feels a little soft, 3rd might cause more problems with feet down. Thats with 200 pounds leathered up.
     
  7. grandpaul

    grandpaul VIP MEMBER

    Joined:
    Jan 15, 2008
    You might try measuring your old springs as compared to the new NJB springs. If the old ones are shorter, just swap 'em out. (yeah, like it's that easy...)
     
  8. Keith1069

    Keith1069

    Joined:
    Jan 10, 2005
    Thanks GP, thought of that but the old springs are very rusty and I'm a tart who likes shiny!!
     
  9. Keith1069

    Keith1069

    Joined:
    Jan 10, 2005
    Understood Ludwig, I fell into the usual trap making that statement.
     
  10. DogT

    DogT VIP MEMBER

    Joined:
    Jan 20, 2009
    And what are the extra rubber buffers for supplied with the shocks?

    Dave
    69S
     
  11. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    For different bikes.
     
  12. gtsun

    gtsun VIP MEMBER

    Joined:
    Sep 21, 2009
    I learn something new here everyday. I thought adusting the shocks would change the stiffness too. Now I know why this bike feels a bit higher than other Commandos I've had! I feel like such a dweeb for not knowing this.( not a new feeling ) The more I learn the less I know!!!
     
  13. olympus

    olympus

    Joined:
    Aug 5, 2017
    Can anyone supply long term usage feedback with NJB shocks please??
     
  14. Onder

    Onder

    Joined:
    May 11, 2010
    I have had them on my 74 850 Mk2 for several years. They are too soft and that is for a less than 9 stone rider!
    Fine if you are just riding around but if you push it in a tight corner you wont be happy. Im ready to spend
    for a better rear end.
    ....hmm that doesnt sound quite right...:)
     
    Last edited: Mar 27, 2019
  15. olympus

    olympus

    Joined:
    Aug 5, 2017
    There has to be a catch looking at the price... but they say you can specify spring rate
    I'll ring them tomorrow to get the low down
     
  16. Chris

    Chris VIP MEMBER

    Joined:
    Jan 21, 2008
    Hi
    Speak to Norman he is a great bloke.
    I fitted a set to my race bike 20 years ago.
    They have been refurbished twice I left them with him at the Stafford show & collected them at the end of the day.
    Springs changed to suit your weight.
    Good bloke. Ex Girling race engineer.
    Chris
     
  17. kommando

    kommando

    Joined:
    May 7, 2005
    They have a std spec for each bike but give them your weight and they will adjust, if you know what you want they again will accommodate as long as it's in stock.
     
  18. cliffa

    cliffa

    Joined:
    May 26, 2013
    No catch, they are as good as Hagons in my opinion (and don't have that bloody horrible Dymo type label), They will supply what you ask for. e.g. I asked for a pair 1" over on my Can-Am 250 and they fitted perfectly. As you say the price is incredible, so i suspect they are manufactured abroad, but I also suspect the Hagon's are as well.

    Cheers,

    cliffa
     

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