Honda CBR250RR 2021 Owner's Manual page 18

Instruments
button
SEL
button
SET
Display Check
When the ignition switch is turned to the ON position, 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.
14
Speedometer
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)