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What make and model is a good British Single? (2009)

Discussion in 'General Classic Motorcycle Discussion' started by Bobs850, Dec 20, 2009.

  1. pbmw

    pbmw

    Joined:
    Jan 28, 2010
    I have a few thumpers. I've always liked them. I think you're going to enjoy your new B50. I have one in a B44 frame
     
  2. Bobs850

    Bobs850

    Joined:
    Sep 18, 2009
    I bought a bike that I probably should not have. When I unloaded it from the truck, I could hear the chain rubbing against the chain guard and the swing arm cross member. I put the bike in the shed and got down on my knees to take a look. The new chain was so long that is was going under the swing arm support and darn near dragging on the floor. I ended up taking out 8 links before I got the recommended free play in the chain. The bike came with a complete new wire harness that was plugged in at random. You would think the MId America Auction house would have some standards when it comes to selling "Restored Bikes". I guess not. None of the electrics work. Turns out the ignition/ electrical box under the frame was missing a ground wire. Easy stuff to sort out and fix. Bike was sold as a matching numbers bike but so far I am having trouble locating a frame serial number.

    All in all I probably overpaid about 1,000 for the bike. It is fairly original on the hard to find sheet metal parts. The suspension is good. I think somebody bought an orginal low milage bike and did a clean up on it. It was last registered in California in about 1973. I am hoping that they did not screw around with the lower end. I plan to be able to fire it up in a few days. I plan to use it as a dirt bike. I am back to looking for a good 500cc single road bike.

    The bike came out of the Palos Verdes area of Southern California. Just goes to show that you can get ripped off by people in the better neighborhoods.
     
  3. Erik Myhre

    Erik Myhre

    Joined:
    Jan 1, 2020
    Hey gents, I am putting together a slimline norton with a bsa b33A engine and trans any suggestions on where to buy engine plates? And a belt drive primary?
     
  4. robs ss

    robs ss VIP MEMBER

    Joined:
    Aug 16, 2016
    It's not to hard to make your own.
    I made different ones from 3mm craftwood sheet until I was happy with the layout.

    Next step was to trace the pattern onto A3 paper taking care with the bolt centres. Then draw the bolt holes with a pair of campuses at least 1mm undersize.

    Next go to a drafting company and ask them to scan into AutoCad format.

    Then buy some plate - I used 8mm aluminium alloy, not sure of the spec - 50XX.
    Take the plate with your AutoCad file to a workshop with a water jet cutter and have them cut the pieces.

    The finished edges should be really good, just needing sanding with emery cloth/paper.

    The undersized holes should then be hand-reamed to give a close fit on your bolts.

    Cheers
    Rob
    27 Oct '10 2.JPG 27 Oct '10 4.JPG 9 Jan '11 7.JPG
     
  5. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
    8mm alloy? Should have used Dural alloy, it's what Triton etc owners use.
     
  6. robs ss

    robs ss VIP MEMBER

    Joined:
    Aug 16, 2016
    Dural, short for Duralumin, covers at least eight different aluminium alloys of the 20XX family.
    The 50XX family, also known as marine grade, can be just as strong/hard as duralumin but are better at resisting corrosion - hence my selection.

    ... and Duralumin also comes in 8mm plate
     
  7. robs ss

    robs ss VIP MEMBER

    Joined:
    Aug 16, 2016
    Just found the receipt for the plate - it was 5083 - high strength and corrosion resistant
     
    kommando likes this.
  8. norton bob

    norton bob

    Joined:
    Nov 29, 2013
    Norton ES2, Norton M50, AJS /Matchless 350/500. Velocete 350/500, Ariel 350/500, BSA B31/33, Plenty of choice just have to find one. The AMC singles have good spares back up in the UK.
     
  9. AgentX

    AgentX

    Joined:
    Jul 2, 2015
    re: a belt drive primary, as appears to be in Rob's pics, the Bob Newby belt and clutch is on both of my britbikes and I couldn't be happier with it. It's taking some fettling on my G15CS to get mounted, but that's a strange application and I knew it would be that way when I got it. Bob's been great with support and the clutch and belt themselves are flawless.

    (Re-Edited as I just saw the original posting was in 2009!)
     
  10. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
    One that at 30mph in top gear goes bang every 2nd lamp post. . . .
     

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