When you say lurching are you going slow as in too slow?Both of my bikes will lurch if I go too slow and if I speed up the lurching stops.
I'll have to do a picture post on the clutch, what it lools like, how it works,and adjustments.

There is some info on the clutch but very little on my post for engine tear down by the way Deacon did you like it? Would've been nice when you were tearing yours down at least I think it would have.
Norman