I'm sure every M20 owner who has replaced his drive side main bearings will have cursed the circlip used by BSA which is difficult both to remove and replace.
A 'straight fit'modern replacement with 'eyes' for circlip pliers is available however.
They are American but should be obtainable through any good bearing factors.
Part number is NI300-0200....Ian

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

I bought some of these circlips on Ian's recommendation. Brilliant idea! Likewise get "modern" clips for that bearing in the chainwheel on QD crinckle hubs. The cost is negligible compared to the hassel of the originals.
Cheers
Pete

email (option): petercomley@web.de

But how can you look the concours judge in the eye knowing you have non standard parts fitted!
Regards
Clive

When I became a man, I gave up chidish things....and that includes conkers! Ron

email (option): ronpier@talk21.com