right i finally took mine apart and mine is the multimatic clutch that acts like a two speed clutch according to the manual
everything was free and working all springs functioning and i couldnt see why it would be dragging
its making a right tinging noise as if a little man has a tiny hammer and hitting the crankcase
BUT this is only at idle and when the back wheel is held still.
so its something on the starter clutch catching or trying to engage which can only be the arms.
the springs on the starter clutch are very weak so as to allow contact of the shoes/arms at slow speeds ie when trying to start and also when moving off.
the manual shows the profile of the linings on the clutch arms and mine are nothing like and i'm wondering if thats what the problem is.
i have two engines and all clutch linings are the same.
ill post pics in a few hours to show