Hi, I have found in a barn what I believe to be a B31. Its virtually completely disassembled. Can you please advise how I can correctly identify the year, model and paint colours for frame and tank, I'm currently working through what parts I have and what's missing so would like to obtain a manual or services sheets to assist me. Thanks
Without necessarily giving away the last 2 digits, what are the frame and engine numbers? Looking these up against model and year should be a good starting point to identifying what you have.
This website will give you the frame and engine numbers for BSA B and A series which might help you identify the bike.
http://www.motobrit.com/motc2/mpages/tech/numbers/bsanumber.php (http://www.motobrit.com/motc2/mpages/tech/numbers/bsanumber.php)
Thank you that list suggests 1953 B31