Honda CRF250F 2023 Owner's Manual page 139

Taking Care of the Unexpected
SYMPTOM: Engine starts, but runs poorly. (cont'd)
POSSIBLE CAUSE
sooty exhaust (rich fuel
mixture)
detonates or pings under load
afterfires (backfires)
pre-ignition (runs on after
ignition switched OFF)
130
Taking Care of the Unexpected
See your dealer.
If applicable, switch to the recommended octane gasoline
(page 54) or change your brand of gasoline. If the problem
persists, see your dealer.
See your dealer.
See your dealer.
WHAT TO DO