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Motorcycle Discussions => British Bikes => Topic started by: anjimehra on December 17, 2008, 06:45:26 AM

Title: BSA 1953 Golden Flash
Post by: anjimehra on December 17, 2008, 06:45:26 AM

Hi
Am restoring a 1953 plunger BSA Golden Flash in Pune, India & would greatly appreciate help on the following:

Does the main roller bearing , drive side, have a seal on one end ( end facing primary drive case ) ?

Thanks in anticipation
Anji

Title: Re: BSA 1953 Golden Flash
Post by: Goldy on December 17, 2008, 07:14:42 PM

Yes. it is a single lip oil seal part number 67-674

Title: Re: BSA 1953 Golden Flash
Post by: L.A.B. on December 17, 2008, 07:37:40 PM

Quote

Yes. it is a single lip oil seal part number 67-674

I too would have expected to find a primary oil seal, however, the '49-'53 parts book doesn't appear to list or illustrate any (67-674) seal?

Title: Re: BSA 1953 Golden Flash
Post by: Blue on December 19, 2008, 01:50:18 PM

Although I haven't had much to do with the semi-unit BSA twins, I'm pretty sure there is not an oil seal between the crankshaft and primary chaincase.  To my recollection the splined sleeve that fits on the crankshaft has a flange on the crankcase end which butts up to the main bearing and encourages some sort of 'splash' lubrication to the engine sprocket.  This flange should have a swirl machined into the perimeter I think.

I hope this helps (and I hope it is accurate)

Blue

Title: Re: BSA 1953 Golden Flash
Post by: L.A.B. on December 19, 2008, 02:33:15 PM

Anji,

I suggest that you contact C&D Autos, who, I am sure, will be able to give you the correct information?

C&D Autos: http://pages.eidosnet.co.uk/~canddautos/

Title: Re: BSA 1953 Golden Flash
Post by: anjimehra on December 21, 2008, 01:58:12 PM

Goldie.L.A.B & Blue
Thanks a ton for your prompt replies. Much obliged & am investigating the various alternatives suggested by you guys.
Take care
anji