Honda CRF125F 2021 Owner's Manual page 45

Tyres age, even if they have not been used
or have only been used occasionally.
Cracking of the tread and sidewall rubber,
sometimes accompanied by carcass
deformation, is an evidence of ageing. Old
and aged tyres must be checked by experts
to determine the suitability for further use.
Using tyres that are excessively worn or
improperly inflated can cause a crash in
which you can be seriously hurt or
killed.
Follow all instructions in this owner's
manual regarding tyre inflation and
maintenance.
Air Pressure
Properly inflated tyres are most important
for safety, and will provide the best
combination of handling, tread life, and
riding comfort. Generally, underinflated
tyres wear unevenly, adversely affect
handling, and are more likely to fail from
being overheated. Underinflated tyres can
also cause wheel damage in rocky terrain.
Overinflated tyres make your motorcycle
ride harshly, are more prone to damage
from surface hazards, and wear unevenly.
Make sure the valve stem caps are secure. If
necessary, install new caps.
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