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Topics - 13Brads

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Some up to date pics of my M21. Now up for sale.

Singles / Value of an M21
« on: 08 October, 2020, 15:02:18 »
I am reluctantly considering selling my much travelled 1952 M21 but have no idea what a realistic asking price would be.
This is the bike that started life with the AA, was purchased by my friend in around 1960 as his daily transport. In 1964, with wife on the pillion and well loaded up they left London bound for Australia and returned home by sea in 1967. Since then it spent time in a museum (long story attached to that), and in various sheds etc until 2015 when the owner died and it came into my possession. I have done the minimum to get her (Betsy) back into operation, in an attempt to keep it as it was at the time of the trip to Aus.
I have attached a couple of pics. First in Berlin well laden, second a newspaper report of when they were in N.Zealand.

Singles / M21.
« on: 01 August, 2020, 19:48:19 »
Good evening.

Can anyone tell me the size of the spring loaded ball in the timing chest of an M21 please?

Singles / Fuel Leak
« on: 11 May, 2020, 16:18:05 »
My M21 has developed a fuel leak. 
The petrol tap corks were replaced some time ago but with the fuel lines disconnected from the carb there is a drip from the pipe about once every 5 to 10 minutes, so not a lot. But over night, the carb is wet with petrol so it suggests the float needle/seat is letting by. The float itself is good. So, can the seat in the bottom of the float chamber be removed/replaced? I haven't been able to find this on the exploded diagrams I have seen. Or is it a case of lapping the needle and seat with some metal polish. I should add that this leaking has only just started after some 5 years of ownership.


The Star and Garter / Matching Numbers.
« on: 12 April, 2020, 11:15:16 »
Good morning.

Some time ago when ordering some parts for my M21, the parts guy at Draganfly Motorcycles told me that BSA bikes never had identical engine and frame numbers. This statement arose because my M21 does have identical numbers. Can anyone give me a definitive answer to this please?

Singles / Single Seat for 1952 rigid M21
« on: 25 February, 2020, 14:09:27 »
Hello. Due to a dodgy spine, I am considering replacing the dual seat on my M21 with a single sprung saddle. Does anyone have any experience or recommendations for doing this please. This is a bike that went two up overland from London to Australia in the 1960's, and I am trying to keep it as it was at that time, but it looks like I may have to compromise on the seat in order to continue using it.
Thanks for any comments.

Singles / M21 oil leak.
« on: 08 February, 2020, 16:42:09 »
I fired up the M21 for the first time in about nine months today. I had to drain the crankcase first to release nearly a pint of oil which had found its way there from the tank. It started first kick and seemed to be fine ,but after a short while, I noticed oil pouring out from behind the primary chaincase as if it was coming from the area of the crankshaft. I haven't investigated this yet, but thought I would ask the group for opinions before I start stripping things down. There was no visible smoke from the exhaust for the shortish period it was running. I didn't have time to check if oil was returning to the tank, but feel sure it was otherwise the build up in the crankcase would have caused it to smoke.                                                                                                                               Any advice/suggestions gratefully received,


Which BSA do you ride? / 1952 M21
« on: 20 November, 2019, 22:27:14 »
Not sure if I have shared this before but here goes anyway.  This is Betsy, an ex AA bike bought by a good friend of mine for 40 in 1960. It then had a sidecar fitted and was used as daily transport. In 1964 with the sidecar removed and some mods carried out my friend and his wife rode overland from London to Australia also taking in Tasmania and New Zealand. They returned by sea in 1967 and Betsy resumed the role of daily transport until being taken off the road in 1970. My friend died in 2015 and his wife gifted the bike to me at which point it was not running. Since then, I have just done what was required to put it back into service, with no intention of carrying out a full restoration.

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