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Ohlins MK3 mock up - transfered from P11

Discussion in 'Norton Commando Motorcycles (Classic)' started by p400, Mar 26, 2019.

  1. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    I had this set of Ohlins, deCarbon type, I built for my P11. Used them for a year and found them satisfactory, but wanted a more competitive look on the P11. Took these off and built a set of piggybacks.

    Ohlins piggybacks, with spring down, have mount problems on road Nortons with chain guard, caliper mount and such.

    I have simply mocked up this Ohlins set on this Mk3 and it looks doable.

    This set shown is 10mm longer at 340mm eye to eye, but the current travel is 105mm, which appears too much.
    It is simple matter of longer body or even an external shaft spacer.

    Anyone running Ohlins on a Mk3?


    20190326_Mk3MockUpOhlins1.jpg
     
    Last edited: Mar 26, 2019
  2. kommando

    kommando

    Joined:
    May 7, 2005
    Koni used a cylindrical spacer made from hard plastic below the bump stop rubber and around the shaft to limit travel when their standard body gave too much travel. It splits after time so I would use a nylon or aluminium spacer.
     
    p400 likes this.
  3. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Thanks , yes a shaft spacer would do for a temporary fix, but not the best for Ohlins product. I am thinking longer body, shorter shaft would allow for larger piston isolated nitrogen area, and decrease stroke as required.

    I thought the Mk3 chain guard would be the biggest fit issue, but actually the disc caliper mount on right side is biggest issue. I have spare caliper mount play with.....and it is the hose mount portion of this heavy steel caliper bracket interfering with lower shock that needs to be offset or revised 8mm or so.
     
  4. kommando

    kommando

    Joined:
    May 7, 2005
    The spacer is to stop the tyre hitting the underside of the mudguard, if it works for Koni, other than the splitting issue, why would it not work for Ohlins.

    Longer body would increase travel and increase length even further.

    Shorter rod would decrease length and the travel but only at the full extension. That's ok only if the tyre does not touch the bottom of the mudguard currently.
     
    Last edited: Mar 27, 2019
  5. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Shaft spacers/limiters are fine if you are fitting universal suspension products to suit applications, Girling did it with the OEM Mk3 Girlings.

    I am looking at clearance with Ohlins preload units and it appears to be a suitable app.


    20190327_Mk3PreloadAdj1.jpg
     
  6. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Mk3 Öhlins still in prototype 20190407_154812.jpg but free sag and rider/race sag look good.
    All oil and filters done, kicked oil up to the rockers, new exhaust sys, LI battery spins engine very well, etc.
    Cant seem to get rear tank strap installed.
    No gas yet, considering Golan filters on each side.
     
  7. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    The springs are rather yellow doncha think...?
     

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