81
British Bikes / Re: AJS 16M 1951
« Last post by dynamic on July 29, 2025, 08:47:04 AM »small metal fragments found in g/box oil so an inspection will be the next move
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82
British Bikes / Re: What is this BSA Frame??
« Last post by john.k on July 29, 2025, 01:00:11 AM »The motor leans forward because the original motor had the magneto at the front ,with space at the back of the crankcase ...........the mega dollar BSA ohv V twins use the same frame backbone ....J 12 and Y 13 ...and sell for mucho dollars
83
British Bikes / Re: What is this BSA Frame??
« Last post by john.k on July 29, 2025, 12:50:50 AM »Its not surprising the motor has been replaced ......the mid 30s BSA singles were not a very good motor ,in fact they were crap .......a very poor effort from such a big maker............which is why they brought in Val Page to redesign all the BSA singles to be decent bikes.......Yes ,I had a couple of 1934 Blue Stars ,good gearbox ,crap motor.
84
British Bikes / Re: What is this BSA Frame??
« Last post by cardan on July 28, 2025, 11:56:00 PM »This sort of thing - this one is a 350 from 1936 - but there were lots of variants.
85
British Bikes / Re: What is this BSA Frame??
« Last post by cardan on July 28, 2025, 11:51:13 PM »Hi Pete,
What a ripper! The main frame is certainly BSA, very likely from a vertical-engined model with the oil in a "sump" out the front, early-mid 1930s. The best plan is to decipher the frame number - on the forged steel backbone somewhere - then have a look at a list of BSA frame numbers to see what comes up. https://www.bsa1930s.nl/engine-and-frame-numbers/
The rest of the bike has been "added" to the older part of the frame. Worth leaving as an interesting mix.
Cheers
Leon
[Ed: took me a couple of goes to spell decipher!]
What a ripper! The main frame is certainly BSA, very likely from a vertical-engined model with the oil in a "sump" out the front, early-mid 1930s. The best plan is to decipher the frame number - on the forged steel backbone somewhere - then have a look at a list of BSA frame numbers to see what comes up. https://www.bsa1930s.nl/engine-and-frame-numbers/
The rest of the bike has been "added" to the older part of the frame. Worth leaving as an interesting mix.
Cheers
Leon
[Ed: took me a couple of goes to spell decipher!]
86
British Bikes / Re: What is this BSA Frame??
« Last post by R on July 28, 2025, 11:23:29 PM »1920s BSA's had an I-section backbone, but I'm not sure if it was like that.
Something about Francis Barnett's "built like a bridge" comes to mind also,
with all those bolted joints ?
Something about Francis Barnett's "built like a bridge" comes to mind also,
with all those bolted joints ?
87
British Bikes / Re: What is this BSA Frame??
« Last post by Rex on July 28, 2025, 03:47:47 PM »The rear plunger section is likely from an A series or B series BSA, but as for the rest?
88
British Bikes / What is this BSA Frame??
« Last post by peteR on July 28, 2025, 11:29:05 AM »Can anyone shed any light on what this frame is?
The engine is a 1952 M21 that has some AA history. I can see that someone has fitted bantam forks to it, but I dont recognise the frame at all.
The frame number is not legible.
The engine is not a good fit into the frame, but am trying to assist my friend identify what he actually has.
If you need any more pictures or info, please let me know.
Cheers
The engine is a 1952 M21 that has some AA history. I can see that someone has fitted bantam forks to it, but I dont recognise the frame at all.
The frame number is not legible.
The engine is not a good fit into the frame, but am trying to assist my friend identify what he actually has.
If you need any more pictures or info, please let me know.
Cheers
89
British Bikes / Re: AJS 16M 1951
« Last post by john.k on July 26, 2025, 05:50:47 AM »Pull the gearbox to bits .....the whole joy of old bikes is pulling them to bits and putting them back together again.
90
British Bikes / Re: AJS 16M 1951
« Last post by R on July 26, 2025, 03:57:02 AM »We are assuming there is nothing untoward going on here,
like a case full of broken teeth jamming up the works. !
Without a full inspection, its a bit of a lottery if this will be good.
Draining the oil and inspecting what comes out is a useful diagnostic tool.
If its nice and clean (and new) it can go back in ?
like a case full of broken teeth jamming up the works. !
Without a full inspection, its a bit of a lottery if this will be good.
Draining the oil and inspecting what comes out is a useful diagnostic tool.
If its nice and clean (and new) it can go back in ?