BSA Owners' Club Forum

The BSA Workshop => Singles => Topic started by: Caddy on 24 July, 2017, 11:39:14

Title: BSA C15 Frame ID
Post by: Caddy on 24 July, 2017, 11:39:14
Hello

Somehow through some late night eBay action I have managed to buy myself a BSA C15, or more correctly a pile of parts that were due to be made into a pre 65 Trials bike. I usually mess around with early Japanese bikes and some Harley's and have never built a British bike and this looked like an enjoyable project.

The frame is this pile of parts was supposed to be a BSA C15T but I'm not 100% sure if this is correct. The start of the frame number looks a bit dubious as it is stamped what looks like C15T which I don't think exists (although the model number does obviously), but the number falls in the correct range for a 1965 C15 Trials frame.

Some pictures of the frame are below and if anyone could tell me if this is a trials frame it would be much appreciated. Also was it common to re-stamp frames and frame numbers? I would like to get this bike registered for the road and I presume this frame number may cause an issue. I can show a picture of the frame number but wasn't sure if this was good idea on the internet? Please let me know if this is ok and I can post a picture.

Thanks for any help  :)

(https://lh3.googleusercontent.com/3mSD0zC3PtrYF9mBKwEH6Hvie8dMocBPlyljQewSFGQ14QjRcqj7s0nq517MnYc49ZUMTeth6TgOsxxMixtsaZ6hsN9W4XDw_wIDs1hlUhL-WSCMQKPa_jh395lwDm3omlVQ3-7kQV8) (https://lh3.googleusercontent.com/GHhgx3xy2PYEl4CVMzn__jrzOx3WOvoTUBkPTPHKFv6nxHZlimw9pTIIzwn63GRv2ArXtmiSim6ou0PS_PIYgf_N-QDrd_mJf6U1RN-1x7HXpj_6jKB9xgdDn94HfrvPowLOCpnUGtk)
Title: Re: BSA C15 Frame ID
Post by: MOONSDRIFT on 24 July, 2017, 12:47:37
Was it usual to restamp the frame number? Well the one I have looks like it was 'scratched' on by a child! Good luck with DVLA and getting it registered, I have been waiting 39 weeks now.
Title: Re: BSA C15 Frame ID
Post by: JulianS on 24 July, 2017, 12:50:55
I would have expected a post 1963 C15T to have a welded frame not a bolt together one, with a number which started C15C.

Altering frame numbers on bikes is the same as altering the vin number on a car - commonly to hide or disguise its identity and/or to forge a new identity.

Photo below is from the 1965 US catalogue. You can see what the frame looks like.
Title: Re: BSA C15 Frame ID
Post by: Caddy on 24 July, 2017, 14:55:37
The circular piece of steel in the down tube and the bend in the seat rails near the top bolt look non-standard as well. Could this be a B40 frame or part of one?
Title: Re: BSA C15 Frame ID
Post by: MOONSDRIFT on 24 July, 2017, 16:19:20
It has been suggested that following an accident or damage a new frame supplied by a dealer may have been used and these frames were not numbered by the factory, the dealer stamped a new number.

This was suggested because I could not believe how 'amature' the frame number looked on my C15.
Title: Re: BSA C15 Frame ID
Post by: JulianS on 25 July, 2017, 09:10:23
A new from factory replacement frame should have been stamped with the original number ofthe frame it replaced.

The problem with this particular frame is that the number used sounds like it is not from a BSA series which will make it hard to date for registration purposes.