The Home of the pre-war BSA Gold Star
This website was launched in January 2010 by George Wander, and is intended to be a pictorial and technical resource for owners and admirers of these wonderful machines. George' s bikes and cache of parts were passed on to new owners in 2022. The site will be continued as an appreciation of George's knowledge of and enthusiasm for these bikes. For latest news please scroll to the bottom of this page.
If you own an M24 or know of one anywhere, do get in touch.
On the site you will find pages detailing the history of the first Gold Stars, technical information, a photo gallery, information on spare parts, information about surviving M24 Gold Stars and links to other sites of interest to BSA and vintage bike enthusiasts.
Any feedback, help with running the website, will be more than welcome. Please click below for Email, or give me a call.
The website domain name is owned by Bob Mayow. Even with 85 year old motorcycles there may be copyright which is still current on published material. Every effort will be taken to ensure that contributions are correctly attributed, and information contained on the site is accurate. Telephone: 07896202761 or email email@example.com
1939 KM24 1938 JM24
New difficult to find BSA, early M series, oil filters, part number 66-8323. Being made to order. High quality all stainless steel construction to original dimensions. See for Sale and Wanted
Information needed. BSA provided valve timing data for 1939 bikes, but I cannot find any published information on valve timing for the pre-1939 M23 and M24. The M23/M24 inlet camshaft number is 66-2086, the M23 Exhaust cam is 66-2073 and the M24 (only) exhaust camshaft number is 66-2087. Phil Irving in his book "Tuning for Speed" gives 35, 75, 70, 40, for the 500cc Empire Star. If anyone has this information please let me know as It may be a while before I have an engine I can check with a degree disc and DTI. Thank you. Bob