use the green slime just on the needle seals ...the HSN housing needs silicone ( high temp sensor safe )
some clutches come with everything you need ...some dont ....if you go with a 3 show one , youll need the flywheel , springs and shoes ..the one i bought had everything i needed
that gear your talking about is the spur gear and where the pads are , thats the slipper clutch ....it should be tight enough so that you can barely turn it ( make it slip ) by hand ( while locking the shaft on the other side with a pin or something else ) ...dont over tighten the slipper clutch nut ....you will flatten the spring washers