juddery wet clutch, what can it be ?

[Benni]

Hello BanterHeads,
my little Dax with 175 Nice engine runs good, but has one annoying feature :
When moving from standstill in 1st gear, the clutch does not engage smooth and evenly,
but judders a bit, which makes the coordination between revs and clutch gripping a bit difficult.
Combined with a low rotating mass and long-ish 1st gear, I stalled the bike twice in traffic *shame*,
and now get moving with more revs than I should have, which sounds and feels not correct.
Lever and cable are new and easy-going, what could be the culprit there ?

[OldGermanHeaps]

Warped steel plate, damaged friction plate, grooves worn in basket, heat damaged spring, loose spring bolt, lots of potential causes.