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Here are some potentially useful pictures of successful British transmission conversions, mostly supplied by their owners. Sorry, I do not have any more details, dimensions, drawings, sources, etc. to go with these pictures.
Here’s an excellent dimensioned diagram of a belt-drive BSA M21 installation from Piet Jan B:  .
Here’s some large pictures of a BSA M21 transmission installation (courtesy of enigmas): .
Click here to see my booklet on the subject: .
Move the mouse over a caption, and see a thumbnail of the picture appear on the TV screen, then click the mouse to see the full-size picture. Please be patient, some files are very large.
Sorry, not all the links work properly yet, you can see all the pictures by clicking here: |
In addition, I've found some useful information on other sites that may be of interest, dealing with identification and dimensions of the original British bikes and frames: |
Velocette Transmission Details |
Velocette Clutch Details |
Norton Commando Clutch Diagram | Norton Atlas Clutch Diagram |
Triumph T110 Clutch Diagram |
Triumph T110 Gearbox Diagram |
Burman Transmission Details |
BSA A10 Service Manual |
“Frankenstein” 45/KH/BSA hybrid |
BSA Frame & Engine Numbers, 1941-50 |
BSA Frame & Engine Numbers, 1951-60 |
BSA A7 & A10 Spring Frame Drawing with Dimensions |
BSA Frame & Engine Numbers, 1961-* |
BSA A7, A10, G.S., etc. Swing-arm Frame with Dimensions
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