BSA 500cc 1951

BSA 500 cc.
This bike will need to be fully restored. Selling on behalf of a family member. From our knowledge the bike is a 1951 BSA Being sold as spares or repairs or a project. Engine does turn over freely. We believe the bike hasn't been started for a few years. Have a folder fully of history on this bike including the original log book.
Viewing highly recommended. Any questions please ask and I'll do my best to answer them.
The frame number on the bike has been ground out. I believe the bike has been involved in an accident many years ago and frame was damaged so replaced frame was used. There is loads of paper work with the bike etc.
Strongly advise anyone to do there research on the bike before buying and would also advise viewing the bike.
Listing updated due to lack of information relating this bike being a genuine Gold Star. Please do your own research on the information provided.