Can anyone tell me if the gearbox housing and inner gearboxcover are interchangeable?

I have seen gearboxes from others makes witch have (matching) numbers, so they are probably line-bored as a set.

But there are no such numbers on the BSA parts....

Thanks in advance, Michiel

Hi Michiel..Yes they are interchangeable...Ian

email (option): julie@wright52.plus.com