Are they the TR91 Trailmax or the ordinary block pattern ones? The TR91s are a sod to break the bead on the rear. TKCs are one of the easiest tyres I've ever removed/fitted.

Trick with the rear is to lift the bead up slightly as roll it inwards over the lip in the rim into the well; best to use a sharp lipped spoon lever for this, but be wary of the tube. For some reason the Z has a tubeless type rim design on the back which doesn't make life easy. You can also use a clamp to break the bead if you want.

No need to replace the tape or tube if they are in good condition. It is worth sorting the Cush drive rubbers though while you have the wheels out.

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