Finfan,
The clutch actuator that attaches to the engine is poorly designed.
The action varies from lot to lot, wth some being worse than others.
The amount of hand force, (At the clutch lever), required to disengage the clutch is minimal.
With our actuator two fingers and a light pull are all that's required.
You can buy a stronger lever, but it's just a band-aid. The real problem is with the actuator geometry.
Jim
Clutch Actuator Upgrade