Aalbert Leuverink Posted February 15, 2018 Share Posted February 15, 2018 Hi , can buying a BSA M21 can any body help me whit the year of production . The owner give my the frame number M214XX9 and engine number M216XX4 . Kind regards Aalbert Quote Link to comment Share on other sites More sharing options...
Ron Posted February 15, 2018 Share Posted February 15, 2018 Aalbert The frame number should have a prefix from the factory ie K,W,X,Y for the year and there is no such thing as an M21 frame number. They are all M20 numbers ie a 1939 M21 would have a frame number KM20 12345 a 1946 M21 would be XM20 12345. The engine however would be stamped ?M21 12345. Some pictures of those number would be best to identify the bike. Too many have fictitious stamping. Ron Quote Link to comment Share on other sites More sharing options...
Aalbert Leuverink Posted February 16, 2018 Author Share Posted February 16, 2018 Thanks for the info , had all ready a bad feeling about the numbers . Will try to get some foto's off the frame and engine numbers . The owner of the bsa is telling me it's is from 1942 . Quote Link to comment Share on other sites More sharing options...
Ron Posted February 16, 2018 Share Posted February 16, 2018 Aalbert it might well be from 1942 although it appears to have any early 39-40 deluxe petrol tank (with the wrong BSA transfers fitted) It also looks like the earlier forks that were changed to 1/2" longer by late 1940. Post war dynamo and regulator and Matchless type battery carrier. All the M20-M21's from 1940-45 had their frame numbers prefixed WM20. Personally I'd want to see clear pictures of both frame and engine numbers before I made the purchase. I'm not trying to piss on anyone's firework, just pointing out stuff as I see it in case you're not aware yourself. The bike could still be a good buy if the price is right and the numbers stack up. Ron Quote Link to comment Share on other sites More sharing options...
Aalbert Leuverink Posted February 16, 2018 Author Share Posted February 16, 2018 L Quote Link to comment Share on other sites More sharing options...
Ron Posted February 16, 2018 Share Posted February 16, 2018 (edited) I can't recall ever seeing a 'Balloon' tank with a Vokes cut off corner? And a car radiator hose is a cheap copp out. Ron Edited February 16, 2018 by Ron Quote Link to comment Share on other sites More sharing options...
Aalbert Leuverink Posted February 16, 2018 Author Share Posted February 16, 2018 So it looks like somebody had some left over in his shed Quote Link to comment Share on other sites More sharing options...
Ron Posted February 16, 2018 Share Posted February 16, 2018 Yes my sentiments entirely. A mixture of parts which is what might have happened in the field or REME workshops. It even looks like a nice early 8" Deluxe headlamp. Ron Quote Link to comment Share on other sites More sharing options...
Hernan Posted July 24, 2020 Share Posted July 24, 2020 Hello, I am from Argentina and I have a bsa M20 frame number XM20 3797, WHAT YEAR IS IT FROM? Quote Link to comment Share on other sites More sharing options...
Ron Posted July 28, 2020 Share Posted July 28, 2020 X would be 1946 I believe. Ron Quote Link to comment Share on other sites More sharing options...
welbike Posted July 28, 2020 Share Posted July 28, 2020 Ron, it's a Miller headlamp! Cheers, Lex Quote Link to comment Share on other sites More sharing options...
Ron Posted July 29, 2020 Share Posted July 29, 2020 Indeed yes Lex.......Although that post was 2 1/2 years ago. Ron Quote Link to comment Share on other sites More sharing options...
welbike Posted July 29, 2020 Share Posted July 29, 2020 Ok, didn't notice that, why did it come up? Cheers, Lex Quote Link to comment Share on other sites More sharing options...
Ron Posted July 29, 2020 Share Posted July 29, 2020 Because Hernan used this thread to ask about his XM21. Ron Quote Link to comment Share on other sites More sharing options...
welbike Posted July 29, 2020 Share Posted July 29, 2020 22 minutes ago, Ron said: Because Hernan used this thread to ask about his XM21. Ron Ah, I wish people would start their own thread, too confusing! Lex Quote Link to comment Share on other sites More sharing options...
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