Firstly - nice bike.
I have a one of Mick Walkers books that has quite a bit in about these, and Ian Falloons SS book that goes into detail, not got them here, but I'll have a look over the weekend to see what's in them. I'll make a note of the books titles and ref numbers etc.
I'm not sure about this but I think there might be an owners club for this type of Duke 750 sport, F1 etc. The Bevelheads web site also has some Pantah stuff on it.
Either way, someone is looking forward to winter.
Piccies as it progresses