Adjusting The Carburetor; Adjusting The Engine Idling Speed - Yamaha YFM350R-W Owner's Manual

Tightening torque:
Purging bolt:
27 Nm (2.7 m·kgf, 20 ft·lbf)
EWB02380
WARNING
Never run the engine in an enclosed area when
purging the spark arrester, otherwise it could
cause injury to the eyes, burns, carbon monox-
ide poisoning, possibly leading to death, and
start a fire.
G Always let the exhaust system cool prior to
touching exhaust components.
G
Always wear eye protection, and make sure
no one is behind the ATV.
G
Make sure there are no combustible materi-
als in the area.
EBU23940

Adjusting the carburetor

The carburetor should be checked and, if neces-
sary, adjusted at the intervals specified in the peri-
odic maintenance and lubrication chart. The
carburetor is an important part of the engine and
requires very sophisticated adjustment. Therefore,
most carburetor adjustments should be left to a
Yamaha dealer, who has the necessary profes-
sional knowledge and experience. The adjustment
described in the following section, however, may
be performed by the owner as part of routine main-
tenance.
ECB00480
NOTICE
The carburetor has been set and extensively
tested at the Yamaha factory. Changing these
settings without sufficient technical knowl-
edge may result in poor performance of or
damage to the engine.
EBU24000

Adjusting the engine idling speed

The engine idling speed must be checked and, if
necessary, adjusted as follows at the intervals
specified in the periodic maintenance and lubrica-
tion chart.
TIP
A diagnostic tachometer is needed to make this
adjustment.
1. Start the engine and warm it up.
8-20
8