Currently watching anything with two wheels that races.

I think you will find (wearing my pedants' hat) that they are Enfield India - not Royal - but we know wot you mean. There are still off-road bikes made here - BSA & Rickman replica type race machines and plenty of speedway bikes like Antig. I think CCM still make their BSA derived machines but I can't say I see many being raced.

Triumph aalso do a really ugly monster triple at 2.3 litres. I have seen one in the UK but they are a collectors restricted edition for the US market. A clever marketing ploy but - yuk.