The plates separated fine, gave them all a jiggle, none of them stuck, so I didn't have to take it all apart, clutch adjustment is fine, can move the back wheel witht he clutch lever in and in 2nd, 3rd etc, it's still stoppign when I select 1st or 2nd, going to trace the wires back, according to the wiring diagram, there is a set of diodes that are part of the circuit, on the diagram, they are in with the starter motor cut out relay, not sure how that affects it as as yet, lovely sunny day and I'm stuck in the garage, ah well.