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

Check 3-6: Neutral Indicator Light (LED) Inspection
Meter Unit Circuit (ZX1000J Model)Precautions
1) No need of topping-up
No topping-up is necessary in this battery until it ends its life under
normal use. Forcibly prying
off the seal cap to add water is very dangerous. Never do that.
2) Refreshing charge.
Give refresh charge for 5 to 10 hours with charge current shown in the text
(see ...
Clutch Installation
Apply engine oil to the needle bearing [A] and the sleeve
[B].
Install:
Needle Bearing
Sleeve
Install the clutch housing [A].
Fit the holes [B] and projections [C].
Engage the clutch housing gear and the crankshaft primary
gear.
Install the spacer [A] and the clutch ...
Exhaust Pipe Installation
Replace the exhaust pipe gaskets [A] and premuffler
chamber gasket [B] with new ones.
Install the premuffler chamber gasket to the premuffler
chamber [C] until it is bottomed so that the chamfer side
faces exhaust pipe [D].
Install the exhaust pipe clamp [E] as shown in the figure.
I ...