It takes about 30 mins to remove and reinstall the clutch in these.
Can be done with the engine in the bike.
Tools-
Philips head screw driver or impact driver to remove the screws retining the covers.
Circlip pliers - internal
flat blade screwdriver and flogtometer to flatten out the retaining washer that holds in place the..
19mm nut afixed to then end of the crank that drives the clutch basket.
Black silastic / form a gasket goop to put it all back together.
Clean the fibre and steel plates and re-assemble.
All else fails get new clutch plates. Barnett do them for about $150 the lot. G4 - G7, KV 100, KE100 through to about 1989 KH100 use the same clutch assembly.
If you go with new then flush the gearbox clean with fuel before fitting and re fill with ATF.
ATF will not work with plates previously used with other oils.