Greetings,
Not sure if your clutch will be the same as that fitted to the Bata Alp 4.0 but I think that it should be. Anyway they are all very similar so take a look at a powerpoint type presentation that I put up on the internet;https://drive.google.com/file/d/0B1BIdt6JX4ukOFhXUmxLNEtSTXM/view?usp=sharing
Might I suggest that you check;
have you got the correct cable?
the movement of the inner clutch cable through its outer sheath when not fitted to the bike
the angle of the clutch perch to the cable entry
the shape and operation of the lever
the route of the cable
the angle of the at rest clutch release arm on top of the casing
the movement of the clutch release arm, held by a pair of grips, with no cable fitted
the clutch internals
Perhaps have a local member take a look with you, you do not say where you live but check out your local Group.
Hope these ideas help, please let us know what you find and how you fixed the problem to build up our knowledge base.
TTFN
Hugh.
Ps just thought of a really odd fault but which 'might' just be relevant, is there a really good earth connection between your engine/frame/battery as I have known control cables 'heat' up and seize when the starter is operated