BSA Owners' Club Forum

The BSA Workshop => Singles => Topic started by: buzzydog on 02 April, 2017, 17:39:19

Title: Engine number
Post by: buzzydog on 02 April, 2017, 17:39:19
I HAVE AQUIRED A C15 BASKET CASE AND SORTING THROUGH THE BITS HAVE COME ACCROSS A NUMBER ON THE CRANK CASE, C15GP2370. IS THIS A PART NUMBER OR ENGINE NUMBER AND IF THE LATTER WHAT DOES GP DENOTE? SORRY IF THIS IS A DAFT QUESTION BUT I AM NEW TO BSA OWNERSHIP.
Title: Re: Engine number
Post by: JulianS on 02 April, 2017, 18:56:55
It is an engine number.

C15GP decodes G as the best and last and most robust of the C15 engines with  improved main bearings and lubrication and the P indicates an engine fitted to a Police specification C15.

It would have been fitted to a frame with the same number.

The first C15G engines were produced in 1966.

Yours is a very late engine,  they ended around 2400,  and would be from 1967.
Title: Re: Engine number
Post by: buzzydog on 03 April, 2017, 20:43:54
Cheers for that Julian. I'll check out the frame number. As I said, it came to me in bits.