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BSA Number Identification #721642
01/10/18 6:09 pm
01/10/18 6:09 pm
Joined: Jun 2016
Posts: 51
Oceanside California
M
mrcarb Offline OP
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mrcarb  Offline OP
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Joined: Jun 2016
Posts: 51
Oceanside California

A friend of mine has an old 64, 65, or 66 BSA A65 in a shed in his backyard that has not run in years and he will not part with. Anyway, I was looking at it the last time I was over there and saw that the numbers on the engine started with A65T and the numbers on the frame started with A50. Could someone tell me if the bike originally came with the engine and frame numbers like this or is it have a non-matching numbers motorcycle?

Thank you

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Re: BSA Number Identification [Re: mrcarb] #721646
01/10/18 6:44 pm
01/10/18 6:44 pm
Joined: Dec 2004
Posts: 9,051
Scotland
kommando Online content
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kommando  Online Content
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Joined: Dec 2004
Posts: 9,051
Scotland
Its likely a bike made before the matching numbers which came in mid way through 66 model year, until then all BSA twin frames were stamped A50x XXXX

Quote
Please note that from January/February 1966 all frame and engine numbers were the same.


Visit www.britbike.com/bsapitstop/dating/post1960.html for more info

Last edited by kommando; 01/10/18 8:19 pm. Reason: Shane is right, a B50 is not an A50
Re: BSA Number Identification [Re: kommando] #721648
01/10/18 7:28 pm
01/10/18 7:28 pm
Joined: Oct 2001
Posts: 1,088
Sydney, Oz
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Shane in Oz Online content
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Shane in Oz  Online Content
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Joined: Oct 2001
Posts: 1,088
Sydney, Oz
Originally Posted by kommando
Its likely a bike made before the matching numbers which came in mid way through 66 model year, until then all BSA twin frames were stamped B50x XXXX
It's A50[x] XXXX rather B50, but I know what you meant smile

Re: BSA Number Identification [Re: mrcarb] #721653
01/10/18 8:31 pm
01/10/18 8:31 pm
Joined: Feb 2011
Posts: 3,387
Orygone
Boomer Online content

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Boomer  Online Content

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Joined: Feb 2011
Posts: 3,387
Orygone
Somewhere I read, on here or some other BSA site, the exact number that change was made. Found it on the BSA owners site:

UNIT A-SERIES
1966 'A' series machines started the season with A50, A50B and A50C frame designations with the usual non-matching engine markings. After frame 3200 the engine and frame markings were the same. There was a short period where the engine marking matched the frame marking but the frame prefix was A50



Bill B...


Boomer

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