Clutch problem

[Big Mac]

Not sure about Sach motors, but I do two things with all KTM (and Husky) clutches and has eliminated all clutch drag:
a) use synthetic ATF
b) adjust tension nuts on the pressure plate using a dial indicator-- hung out there on a magnetic arm--to get it as flat as possible, with the clutch lever bungee-corded to the handlebar.

Old baskets with grooves worn in the fingers make things work poorly, but otherwise this has cured all drag problems for me.