Honda PCX125 2011 Owner's Manual page 170

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)
If Your Engine Quits or Won't Start
See your Honda dealer.
If applicable, switch to the recommended octane
90
gasoline (page
gasoline. If the problem persists, see your Honda
dealer.
May damage catalytic converter.
See your Honda dealer.
May damage catalytic converter.
See your Honda dealer.
Taking Care of the Unexpected
WHAT TO DO
) or change your brand of
163