Britbike forum Forums British Motorcycle specific Brands Bsa bulletin board B50 vs B25 Fuel tank

Asking for a friend who has a 1967 B25 with a glass tank. He tried and failed with the Caswell liner. He has a line on a B50 rolling basket case that has a steel tank (model year unknown right now). Does anyone know if he could use the B50 steel tank on his B25? If more info needed, what should I tell him to look for?

Ray

The backbone on the B50 frame is much larger than on the pre OIF B25 so with work to the frame buffers, mounting hardware and possibly the seat position it can be done but much easier just to go for a B25 1969/70 steel tank as they are a straight swap with minimal work on the central pull down mount and a useful 3 1/4 gals capacity on the 69 version. The 69/70 B25 UK general export is the same as the US 69 but for 70 the US B25 went for a smaller tank but the fitting is just as easy as a 69.

B44 with TR25 OIF tank. Tank rubbers have added foam rubber to help centralize the tank. Only trouble was clearance for the fuel spigots with the B44 motor, but in any case, I think the B50 tank (slightly different shape in front) has the fuel taps further back. Non-standard seat so I don't know if that will be a problem.

Tom

Thank you very much, kommando. That's exactly the kind of info I was after. I'll pass that on to him.

(edit) Tom, I guess we were typing at the same time. Thanks for your input too, and for the pics. That is a very cool looking machine you have there.

Good to hear from you, Ray. It's been a while.

We got an inch of snow in northern Illinois last night.