Can you identify this motorcycle?

[Anonymous]

This post has been removed at the author’s request.

[Anonymous]

[Michael GilliganParticipant @michaelgilligan61133]

BSA M20 is in with a chance : **LINK**

https://classic-motorbikes.net/wp-content/uploads/2015/10/10715.jpg

MichaelG.

[Former MemberParticipant @formermember12892]

[This posting has been removed]

[Anonymous]

This post has been removed at the author’s request.

[Andrew TinsleyParticipant @andrewtinsley63637]

Looks like my father's pre war James 198cc twinport.

Andrew.

[Mark RandParticipant @markrand96270]

There were an awful lot of M20s made over nearly 20 years, in both military and civilian versions, so there was a fair bit of variation.

[Michael GilliganParticipant @michaelgilligan61133]

Is there a certificated Rivet-Counter on the forum ?

… We need your assistance:

MichaelG.

[Former MemberParticipant @formermember12892]

[This posting has been removed]

[SteviegtrParticipant @steviegtr]

There was also a M21 600cc version. Or could it be an Aerial. ?? really no idea .

[Anonymous]

This post has been removed at the author’s request.

[duncan webster 1Participant @duncanwebster1]

Looks a lot like a BSA C10, I had one once, horrible thing

[JohnFParticipant @johnf59703]

My observations are it appears have a solid frame and girder forks so most probable pre war or at least pre 1950 I think, Had a short search and a BSA C10 c1939 seems a possibility, the timing cover looks similar and its a side valve engine [C10 was made for several years well into the 50's with tele forks] See a couple of links

https://www.feked.com/images/detailed/32/IMG_4849-1000.jpg

https://classic-motorbikes.net/wp-content/uploads/2015/10/9092.jpg

John

edit — Ha! Duncan beat me to it 

Edited By JohnF on 23/01/2022 20:53:30

[Chris Evans 6Participant @chrisevans6]

Another vote for sidevalve BSA C10.

Second thoughts the girder fork side links don't look like BSA.

Edited By Chris Evans 6 on 23/01/2022 20:59:40

[Anonymous]

This post has been removed at the author’s request.

[Robert ButlerParticipant @robertbutler92161]

The OP image does not show access to the valve chest so unlikely to be a C10. I am inclined more to the two stroke theory.

Robert Butler

[Bill PudneyParticipant @billpudney37759]

Whatever it is, or isn't, it's what used to be described by "One Track", in Motorcycle Sport as "….grey porridge…."

cheers

Bill

[Robert ButlerParticipant @robertbutler92161]

Also no sign of an oil tank and most 4 strokes of that era are dry sump.

Robert Butler

[mgnbukParticipant @mgnbuk]

Carb mounts at the top of the cylinder, so unlikely to be a two stroke.

No idea of the maker though.

Nigel B.

[Michael GilliganParticipant @michaelgilligan61133]

[Robert ButlerParticipant @robertbutler92161]

May be, but carb may not be bolted directly to cylinder, may be a manifold or downdraft mounting. The puzzle is there appears to be a timing chest or it could be a mag dyno drive?? The no oil tank is a pointer to 2 stroke. The Classic Motorcycle – Richard Rosenthal expert on old motorcycles.

Robert Butler

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Robert Butler on 23/01/2022 22:52:05:

[…]

The no oil tank is a pointer to 2 stroke.

.

Please see opening paragraph … here: **LINK**

https://www.cyclechaos.com/wiki/BSA_C10

MichaelG.

[Robert ButlerParticipant @robertbutler92161]

Michael, the OP image shows the engine fitted with an alloy cylinder head whereas the catalogue shows an iron head. The catalogue shows what appears to be a tool box on the off side and yet other images on the web show an oil tank for the dry sump lubrication on the offside where you would expect it to be located.

Robert

[Robert ButlerParticipant @robertbutler92161]

However other images show either an alloy cylinder head or one finished in silver?

Robert Butler

[Fowlers FuryParticipant @fowlersfury]

This is it surely:-

[Author]

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