Got round to having a look at the starter.
I couldn't see owt wrong with it!?!? The Black wire is soldered/welded in some fashion and there are no obvious issues!?
Interesting taking it to bits and actually it looks like a nice bit of kit. Bloody clever, the gearing bit
Oh, and it is not China tut it is made in the good old US of A
So, put it back on and tried again and still a feeble effort.
Took the plugs out and spins up like a champ and wire not getting hot so maybe it just aint got the kahoonas to kick a hi comp stroker in to life. Hey ho.