If the display function does not work, replace the meter unit.

Check 3-6: Neutral Indicator Light (LED) Inspection
Meter Unit Circuit (ZX1000J Model)Engine Installation
Apply molybdenum disulfide grease to the threads of the
adjusting collars [A].
Install the adjusting collars to crankcase backside until
end of the threads.
Install the adjusting collar [A] to the frame until end of the
threads.
Replace the engine mounting nuts with ne ...
Intake Air Pressure Sensor #2 Installation
NOTE
The intake air pressure sensor #2 is the same part as
the intake air pressure sensor #1.
Installation is basically the reverse of removal.
Position the intake air pressure sensor #2 [A] between the
projections [B] on the rubber damper.
Install the rubber damper [A] on the brac ...
Camshaft Chain Tensioner Installation
Replace the O-ring [A] with a new one.
Apply grease to the new O-ring.
Release the stopper [B] and push the push rod [C] into the
interior of the tensioner body [D] so that the position of the
push rod is 3 or 4 notches [E] as shown in the figure.
Install the tensioner body so that the ...