hi guys there is no apparent leaking from the head and this engine's flywheel is located by a D on the crankshaft so i think it is rather unlikley that that has moved i could be wrong about that though
i now know the throttle cable is bent at the carby end and i think that maybe it had popped out [i didnt notice when i took the carby off] i think the carby may be stuck at a low rev range causing the engine to stall out the way it did with a bit of luck maybe a new cable will sort it out but that has to wait till next week as ive got other things to take care of i will let you guys know.