Rear wheel bearings for the Tour are 6203 2RS. They should be easy to get from bike shops or bearing suppliers, but if you're stuck, BSA-Regal will have them. A 'must have' for all Skorpion owners is the parts book, 10 UK pounds plus postage from MZRC Regalia Officer Mike, click on http://sites.ecosse.net/mzregalia/ for details. Makes it a lot quicker and easier to order from BSA-Regal when you know the part numbers!
Norman
Great, thanks. I generally just get bearings at my local bearing suppliers, but thanks for the tip about the parts book - I've only had the bike a week.
For info, MPS are doing a special offer on tyres to suit the Skorpion. £90 a pair for Continental "Avenue" H rated.
grussell