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  1. #1

    Default Machine show build

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ID:	88870Hi all , I have been lucky enough to be picked as an invited builder for the 2019 Machine show here in Australia. I’m putting together a BSA A7/M20 mashup. Just starting a thread as a bit of self motivation. Click image for larger version. 

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    Last edited by Vinniecenz; 11-17-2018 at 7:44 PM.

  2. #2
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    Join Date
    Dec 2017


    Definitely looks like an interesting project...What is your overall vision for the be done in 4 monts?

    Had to look up about the M20 engine:
    The BSA M20 was just part of BSA's massive wartime contribution to Britain's war effort. But it was a very big part. 1937 was its first year of production that would last until the late 1950s. Designed to be simple, rugged and reliable, the M20 was a side-valve (flathead) 500cc air-cooled single with a cast-iron top end...
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    ...126,000 M20s and WM20s (the military designation) served in nearly every field of battle during World War 2. This makes it the most-produced military motorcycle of the war. The M20 was also one of the longest-serving military motorcycles in British motorcycle history, serving from 1937 through the early 1960s. BSA's Small Heath factory was bombed by the Germans in 1940, but mega-corporation BSA had 67 other factories scattered around England, so production quickly resumed.

    and that plunger frame:
    The first 'plunger' frames appeared at the Earls Court Motorcycle Show in 1948 & were first used in production on the top-of-the-line 1949 BSA 500 Star Twin. The plunger frame would spread to the entire 500 twin lineup for the 1950 model year.
    While the plunger was a big improvement over the antiquated rigid frame, it did offer some suspension travel, it was at best a poor compromise. Plungers were widely used by many manufacturers at the time, for the same reason that BSA chose it. It allowed them to continue to use their old rigid frames (with a few mods), rather than ditching them for an entirely new swingarm frame...An all-new swing arm frame was introduced in 1954.

    and The Machine Show:
    The Machine Show is a 30y and older motorcycle show and camp out weekend in Braidwood NSW. March 29th-31st 2019...

    Photo Gallery: The Machine Show, Australia

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