Thank You to all, I got it now, am searching out a relevant haynes manual on fleabay, there is plenty of choice on there, and I certainly don't mind greasy grubby examples.

My replacement feeler guage was totally wrong, not in the range of sizes I need, even checked with a micrometer, the blades were not even what the etched size mark said, I do wonder how many people just take what is read with measuring tools.

Anyway, I have now found another feeler guage in the correct range and only nine blades in it, all of them of use with this engine.

What got me I think, is the most excellent procedure with photographs on this website, it was when spanner sizes were coming up different it must have started a bit of a worry situation, that and the fact that turning the motor over with no oil in it, is a bit scatchy and clangy at bottom dead centre, things like that worry me. The scratchy noise will be piston rings, but the tinkly clangy noise I am hoping is the timing chain, although I know the change in direction of forces whilst winding past bottom dead centre and top dead centre there is often a smooth bit to the winding, where the turning becomes momentarily easy then hard again. I suppose really I shouldn't be doing this with a dry engine and that an engine that has not run in four months, as dry, it will be noisy and there worrisome.

Anyway one of the bolt size differences, was the crankshaft nut, it was not 17mm, but 15mm.

I am just wishing I could drag the bike inside my flat to do these things in comfort, as going out there into the car park between rain showers and the wind blasting off the sea is no fun at all, even my bike cover took a flight over the cliff.