Honda CRF125F 2022 Owner's Manual page 78

Engine Oil
Engine oil quality is the chief factor affecting
engine service life. Change the engine oil as
specified in the maintenance schedule (page
57).
When running in very dusty conditions, oil
changes should be performed more frequently
than specified in the maintenance schedule.
Please dispose of used engine oil in a manner
that is compatible with the environment. We
suggest you take it in a sealed container to your
local recycling centre or service station for
reclamation. Do not throw it in the trash or
pour it on the ground or down a drain.
Used engine oil may cause skin cancer if
repeatedly left in contact with the skin for
prolonged periods. Although this is unlikely
unless you handle used oil on a daily basis, it is
still advisable to thoroughly wash your hands
with soap and water as soon as possible after
handling used oil.
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Changing the oil requires a torque wrench. If
you do not have it and the necessary skill, we
recommend that you have your dealer perform
this service.
If a torque wrench is not used for this
installation, see your dealer as soon as possible
to verify proper assembly.
Change the engine oil with the engine at
normal operating temperature and the
motorcycle on its side stand to assure complete
and rapid draining.