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Re: WM20 Primary Chaincase

Thanks Ron...Ian

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

Re: WM20 Primary Chaincase

Ron Pier
Rob a correction to your probable typo. The WB30 inner chaincase is 65-7578 and is listed in the 1947 parts list as being also fitted to the B31-32-33-34. Ron
Thanks Ron, quite right.

Rob

email (option): robmiller11(a)yahoo.co.uk

Re: WM20 Primary Chaincase

I've come across these multitude of similar but different BSA chaincases in the past.

I've got this pair of heavily painted cases that came with my B30 project and I'd like to check them out before I spend too much time on them.

Can anyone give me a clue where to look for the part numbers? So far I haven't seen anywhere to start looking.:mag_right:

Any pictures of yours Danny? Ron

DSCF5591-2

email (option): ronpier@talk21.com

Re: WM20 Primary Chaincase

PS I've found the number on the outer 66-7503 which seems to be the usual BSA way on being one number out (66-7502). I guess for a part before it is finished?

Still looking for the inner number. Ron

email (option): ronpier@talk21.com

Re: WM20 Primary Chaincase

Had a look at the ones put by for my GPO WM20 and WB30 and Ian is right its the rear chain guard mount which differs.

Left marked 65-7578 Right 66-7602

Rob

inner1

inner2

email (option): robmiller11(a)yahoo.co.uk

Re: WM20 Primary Chaincase

66-7525 was the outer cover on 1940 M23 and 1939 M23 M24, how did it differ from 66-7502 M20 & M21?

Is that the version with the shallow clutch dome?

Rob

email (option): robmiller11(a)yahoo.co.uk

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