Honda Supra GTR150 2020 Owner's Manual page 20

Instruments
Display Check
When the ignition switch is turned on, all the mode and digital segments will show.
If any part of these displays does not come on when it should, have your dealer check
for problems.
16
Tachometer
NOTICE
Do not operate the engine in the
tachometer red zone.
Excessive engine speed can adversely
affect engine life.
Tachometer red zone
(excessive engine rpm range)