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Side car bits Identity

  • 21 Feb 2021 8:34 PM
    Message # 10123156

    Anyone have an idea? Believe clamps are vintage Watsonian for 1 1/8" tubing? Holes are for 1/2 and 3/8 bolts.  Eyebolt has 1/2-20 thds and 3/4hex nut cad plate.

    4 files
  • 22 Feb 2021 7:16 AM
    Reply # 10124586 on 10123156

    many of the clamps and eye bolts were adaptable to various machines and sidecars. not sure what info you are looking for. The main problem in newer machines is spreading the load. where 50.s frames often had lugs cast as part of the frame, newer frames were never intended to carry the stress of a sidecar. even Norton Commando's for instance were warned not for sidecar use due to lightweight Reynolds 531 tubing same for BMW etc.

  • 22 Feb 2021 5:32 PM
    Reply # 10126377 on 10123156

    The eye-bolt could be fitted to a built in-frame lug under the seat of the bike. The strut from that eye bolt down to the sidecar frame would have clevis fittings on each end to fit the eye-bolt under the bike saddle. At the sidecar frame rail the split clamp would fasten around the inner frame rail and have one bolt and an eye-bolt similar to the one you have to fit in the clevis of the lower end of the strut. Eye-bolts from the built-in lug under the steering head of the bike are usually longer in the "eye end" to as to clear the bulge of a bike's gas tank . Such longer eye bolts are sometimes needed at the lug under the saddle.


  • 24 Feb 2021 8:12 AM
    Reply # 10132722 on 10123156

    I think #3 & #4 are watsonian as they look similar to clamps on my watsonian.

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