GPz305 clutch question

Question related to Kwak GPz305.

I have a little (not smooth) movement between the crank-driven big gear
behind the clutch and the outer (larger) part of the clutch itself.
These two parts have been tight in other bikes I have looked at.

Sorry, that's a terrible pair of sentences. This has nothing to do with
the clutch plates (they have been taken out). I wonder if there's some
sort of damping mechanism responsible here, or if the clutch is simply

There is a damper, which seems to wear, but on my old 305, never caused a
problem.

loose. To know for sure, I'll have to build myself a clutch extractor
tool and take the inner part of the clutch out, but I just wondered if
anyone knows about such a damping system fitted to this model of bike?
Or whether something is just loose.

Thanks for any help you can offer.

The clutch housing gear should be firmly attached to the clutch - if there
is any movement at all then something is VERY badly wrong and the
clutch/housing gear assembly needs to be replaced. However, if you are
referring to the backlash between the primary gear (attached to crankshaft)
and the clutch housing gear (this is the large gear that sits behind the
clutch) then this should be no more than 0.15mm.