I stand correct Doug. Yes, the 7R was an Ajay. I thought the engine casing didn't look quite right for a 7R. Has been a while since I was involved in road racing.
Bore is the hole through the centre. Where about are you located? I broke a Gazelle a few years back. I kept some of the pulleys and I think I have one like that. I'll check tomorrow.
Gave the underneath a couple of coats of agricultural enamel a few days ago.
Yes! I know it's black. Using up a tin of it.
Yesterday got this cleaned and red oxided.
This morning got the shell top cleaned.
All the other bits are at a friends being blasted.