Adjusting The Carburetor; Adjusting The Engine Idling Speed - Yamaha YZ85(A) Owner's Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
10. Install the seat.
7

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
without sufficient technical knowl-
edge may result in poor perfor-
mance of or damage to the engine.
7-14
EAU42110
Adjusting the engine idling
speed
The engine idling speed must be ad-
justed when necessary.
1. Start the engine and thoroughly
warm it up.
2. Turn the throttle stop screw until
the engine runs at the lowest pos-
sible speed.
3. To increase the engine idling
speed, turn the throttle stop screw
ECA10550
in direction (a). To decrease the
engine idling speed, turn the throt-
tle stop screw in direction (b).
settings
1. Throttle stop screw
EAU44390