Purchasing sockets - What sizes do you recmmend

I would suggest a look on a well-known internet auction site for a set of Whitworth sockets, from 3/16" upwards. Worth going for a quality brand too - Britool or similar. Gordon.

I have a preference for 3/8" drive when working on most things motorcycle. If you're not intending to dismantle cranks, then a 3/8" drive Whitworth set up to and including 1/2" Whit. will cover most needs (wheel spindles for instance are 1/2" whit).

Something like this King Dick assortment :-

http://www.cumminsandjennings.com/38_drive_Whitworth_socket_7_piece_King_Dick_Set/p1329722_6165716.aspx

If you already have 1/2" drive tools then that may make more sense but will be a bit clumsy for some areas.

You certainly won't need American AF or metric sockets for working on a 1940s Norton and the BA fittings can be dealt with using spanners.

Oops - should have mentioned 3/8" drive. Clean forgot. Would also recommend 1/4" drive BA sockets. I find them invaluable for fiddly magneto nuts. Also just the thing for timing K2F mags on the twins. Gordon.

I bought a nice set of British Standard sockets from Snap-On. The smaller sizes are 3/8 drive and the large ones 1/2 drive.