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M20 Frame and Engine numbers

I bought a BSA M20. The title says that it is a 1937. But the Engine # is 99037 and the Frame # is AS/102. If anyone can help me get the correct year that would be great!! Thanks

email (option): bobbibler@msn.com

Re: M20 Frame and Engine numbers

Is that WM20 99037 ? That will be a 1944 build under contract S2603.

Do you have a photo of the frame number ? Does it have a prefix ?

Re: M20 Frame and Engine numbers

Hi Bob,

What you have is a WWII motorcycle with a replacement frame. This frame number is in the keycards, this card gives information about the bike during it's post war military use at BAOR in Germany. It also gives a C1434758 tank number, a C14 tank number indicates its rebuild during the war. This is one of the bikes that saw a very long military use, as you can see it's sold in 1970.

Henk

Photobucket

email (option): ahum@quicknet.nl

Re: M20 Frame and Engine numbers

The 'AS' term seems to have been used by Nortons for spare engines as well and the ledgers imply that it indicated 'Army spare' although that sounds a little too easy.

The location prior to disposal was 16 Base Vehicle Depot, British Army of the Rhine. A quick Google shows that 16BVD RAOC was at Olen, Belgium.

http://homepage.ntlworld.com/g.e.malthouse/Emblem/index.htm

Where is the bike now, Bob ?

Re: M20 Frame and Engine numbers

I am in the State of Iowa in the USA. The bike runs, but was thinking of maybe putting on a new carb and wiring harness. All the info from you both has been great!!

email (option): bobbibler@msn.com

Re: M20 Frame and Engine numbers

That's interesting Bob. A number of the M20s which US dealers imported in the 1960s and 1970s still bear Belgian customs seals so were probably also from Olen sales.

One of the reasons that there are quite a lot of M20s and 16Hs in Belgium is that the former sidecar-crosser Leon Liekens had a business which sold many ex-WD bikes and spares at Wiekevorst which is about 8 miles away. I have heard that he had very good connections at the depot.

The machinery stored at Olen would have been very much reserve stock and was sitting there waiting for the Russians to invade. It was probably the M20 deterrent that put them off.

Some photos would be great !

Re: M20 Frame and Engine numbers

'It was probably the M20 deterrent that put them off'....I doubt it Rik...I owned a Russian sidecar outfit and after that, stopped worrying about a Russian invasion of Europe...They would all have broken down long before reaching the channel.. ..'The Russian Nightmare' as I jokingly called it due to the multiple problems encountered before the crank snapped at approx. 10,000 miles from new..Material specs, bearings ,machining tolerances were all to forced labour standard, done on a particularly chilly day in a Northern Siberian Gulag by a half starved ex 'Hero of the Revolution'........Ian

email (option): ian@wright52.plus.com

Re: M20 Frame and Engine numbers

Bob
You live anywhere near Clinton, Iowa?
I was just wondering as I have a friend there

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