User Manual - Page 187

For 2012 TRX450R.

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SYMPTOM:
POSSIBLE CAUSE
idles roughly, too
fast, stalls
WHAT TO DO
Check engine idle adjustment
(page ). If the problem persists,
see your dealer.
pre-ignition (runs on
after ignition
switched OFF)
afterfires (backfires)
See your dealer.
See your dealer.
If applicable, switch to the
recommended octane gasoline
(page ) or change your brand of
gasoline. If the problem persists, see
your dealer.
detonates or pings
under load
sooty exhaust (rich
fuel mixture)
See your dealer.
blubbers (rich fuel
mixture)
See your dealer.
runs erratically,
misfires
See your dealer.
high coolant
temperature
Check the high coolant temperature
indicator. Refer to
page .
poor engine
performance at
altitudes above
4,500 feet (1,500 m).
Ask your dealer to modify the
carburetion with a high altitude jet.
Refer to
page .
improperly throttle
freeplay
Check the throttle freeplay
(page ).
116
110
202
185
85
Engine starts, but runs poorly.
If the High
Coolant Temperature Indicator
Lights,
HighAltitude Carburetor
Adjustment,
180
If Your Engine Quits or Won’t Start
Taking Care of the Unexpected
11/05/25 11:43:55 31HP1660 0189 
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