9-19
9
3. Tap the spark arrester lightly, and then use a
wire brush to remove any carbon deposits.
4. Insert the spark arrester into the muffler and
align the bolt hole.
5. Install the tailpipe bolt and nut, and then tight-
en the nut to the specified torque.
WARNING
EWB02342
Always let the exhaust system cool prior to
touching exhaust components.
Do not start the engine with the spark arrester
removed. Sparks or exhaust particulate can
cause eye injury, burns, or start a fire.
EBU23942
Adjusting the carburetor
The carburetor should be checked and, if neces-
sary, adjusted at the intervals specified in the pe-
riodic maintenance chart. The carburetor is an
important part of the engine and requires very so-
phisticated adjustment. Therefore, most carbure-
tor adjustments should be left to a Yamaha dealer,
who has the necessary professional knowledge
and experience. The adjustment described in the
following section, however, may be performed by
the owner as part of routine maintenance.
NOTICE
ECB00481
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.
EBU24002
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 chart.
TIP
A diagnostic tachometer is needed to make this
adjustment.
1. Start the engine and warm it up.
TIP
The engine is warm when it quickly responds to
the throttle.
Tightening torque:
Tailpipe nut:
10 N·m (1.0 kgf·m, 7.4 lb·ft)
UB8W13E0.book Page 19 Tuesday, June 1, 2021 1:16 PM
