I have got a service manual. In the chapter 7-16 is the following:
Drain the engine oil
Right Lower Fairing
Switch Terminal Bolt
Oil Pressure Switch
Oil Pressure Switch Installation
Apply silicone sealant to the threads of the oil pressure
switch and tighten it.
Sealant - Kawasaki Bond (Silicone Sealant): 56019-120
Torque - Oil Pressure Switch: 15 N·m (1.5 kgf·m, 11 ft·lb)
Install the switch lead direction downward.
Apply grease to the terminal, and tighten the terminal
Apply a small amount grease to the terminal so that
grease should not close two breather holes [A] for
I think it is not too difficult procedure.