PERIODIC MAINTENANCE AND MINOR REPAIR
6-17
6
Adjusting the carburetor
The carburetor is an important part of
the engine and requires very sophisti-
cated adjustment. Therefore, most car-
buretor adjustments should be left to a
Yamaha dealer, who has the neces-
sary professional knowledge and expe-
rience. The adjustment described in the
following section, however, may be ser-
viced by the owner as part of routine
maintenance.
NOTICE:
The carburetor has been set and ex-
tensively tested at the Yamaha fac-
tory.
Changing
these
settings
without sufficient technical knowl-
edge may result in poor perfor-
mance of or damage to the engine.
1. Air filter check hose
2. Clamp
6. Install the panel.
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 lubrication
chart.
The engine should be warm before
making this adjustment.
TIP
The engine is warm when it quickly
responds to the throttle.
A diagnostic tachometer is needed
to make this adjustment.
1. Remove cowling B. (See page
6-5.)
2. Attach the diagnostic tachometer
to the spark plug lead.
NOTICE
2
1
