Print Page - BSA B31 Frame no

Title: BSA B31 Frame no
Post by: Tomnr on 12 Dec, 2019, 13:43

Hi :)

I recently purchased a b31. The frame no says its CA7.154××, As I came to know which CA7 came for twins. Yet this frame allows to have the right side bottom frame space for a B31 sump space which use for the oil pump also (quite a U shape). I am wondering is it a b31 frame or a goldstar frame. But still the chassy no makes me quite confuse. :o, your idea would welcome

Thanks
Tom

Title: Re: BSA B31 Frame no
Post by: DerekAnderson8 on 12 Dec, 2019, 17:41

I have an FA7 prefix frame number in my garage with the kink in the frame.

I dont know when it was converted but i think it was quite common back in the day.

derek

Title: Re: BSA B31 Frame no
Post by: Tomnr on 13 Dec, 2019, 06:49

Hi Derek :)

Is it possible to have the CA7 no for a B31 frame ?

Thanks

Title: Re: BSA B31 Frame no
Post by: DerekAnderson8 on 13 Dec, 2019, 07:56

Quote from: Tomnr on 13 Dec, 2019, 06:49
Hi Derek :)

Is it possible to have the CA7 no for a B31 frame ?

Thanks

I would say no.

The frame i have is modified with a piece of round tubing added in place of the kink that is usually found on Goldstar or B31 frame.

(https://www.bsaownersclub.co.uk/forum/proxy.php?request=http%3A%2F%2Fthumb4.zeppy.io%2Fd%2Fl400%2Fpict%2F153704338254%2Fbsa-gold-star-dbd34-1958-frame-cb32-7xxx-goldstar&hash=18f41f591bb1f5ad46cf0d9d003b7560d9519dad)

BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: Tomnr on 12 Dec, 2019, 13:43