In this video i will be making a full exhaust system for a BSA WD-B40. Where the ‘WD’ stands for War Department.

    These bikes were used by the Army to compete in Enduro events such as the International Six day trials. And the customer wanted to make a system that would reflect this, by copying the style of system fitted to Works BSA Motocross bikes, such as the BSA B50mx and later the iconic CCM 500mx.

    I have a lot of experience making this style of system, and have made over 60 sets in the last ten years. So the design part was easy, but the challenge came with trying to fit the system to a bike it was never made for.

    It the gaps were a lot tighter than they would be on a Motocross bike, and the routing had to be extremely accurate.

    As with most of my Pipes, i used the traditional technique of Sand Bending. and fabricated a Works style silencer to go with it, that contained a removable baffle. So that the customer got “the best of both worlds” with a nice loud exhaust system, that he quieten down, when using it on green lanes etc, Where he may encounter the public.

    I hope you enjoy watching another episode from the Raysons Workshop.
    And any feedback about the video would be greatly appreciated.

    Thanks Ben Hardman
    Raysons Exhausts
    Rochdale UK

    8 Comments

    1. Hey, just stumbled across your channel and its great to see some proper ‘old school’ engineering still going on… I come from the same engineering era as your family and appreciate seeing fire, steel and downright mechanical skill in play… Keep it going man!

    2. Utube recommended this Vid – and Fark I am glad they did ! Could not keep my eyes off it at all/all of it.
      You are doing very Well, it's my Pleasure to watch a Craftsman exercise his Talent.
      Cheers bluddy lots Mate !
      ( from Western Australia )

    3. Bit behind with videos, sorry for the loss of your cat, they become real family members,
      Fantastic looking bike really like the look, and as always your attention to detail.
      Very nice 👌 🏍🏍🏍

    4. As soon as I heard Unity Equipe I was time travelled back to about 1978 when I took a trip there! At time I was building a 1969 Triumph T120 to cafe racer style, I kept seeing Unity ad's in Bike mag and MCN and they seemed to have the bits I needed, hence the trip. Trip because I lived in Yorkshire at the time, specifically Sherburn in Elmet, home of the Coffee Bar, or Squires to some. From memory I picked up Tomaselli alloy clipons and levers, some engine dress up parts, alloy bellmouths, high level pipes and reverse cone megas, possibly some other bits, I can't recall, it was a long time ago! The cafe racer restyle didn't make the cut though, I changed my mind and went for a concourse resto instead! Did a deal with Trevs motorcycles in Doncaster and part swapped all those bits for some engine parts and a few other original bits. Wish I still had the Bonny, but I sold that and a 900SS Ducati to buy a Honda CB1100RC, the things you do in your youth!

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