Yamaha YZ85(R)/LC, Owner'S Service Manual

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INSP
ADJ
PILOT AIR SCREW ADJUSTMENT
1. Adjust:
●
Pilot air screw
1
Adjustment steps:
NOTE:
To optimize the fuel flow at a smaller throttle
opening, each machine’s pilot air screw has
been individually set at the factory. Before
adjusting the pilot air screw, turn it in fully and
count the number of turns. Record this num-
ber as the factory-set number of turns out.
●
Turn in the pilot air screw until it is lightly
seated.
●
Turn out the pilot air screw by the speci-
fied number of turns.
Pilot air screw:
2 turns out (example)
5PA30230
ENGINE IDLING SPEED ADJUSTMENT
1. Start the engine and thoroughly warm it up.
2. Adjust:
●
Engine idling speed
Adjustment steps:
●
Turn the throttle stop screw
1
until the
engine runs at the lowest possible speed.
To increase idle speed
→
Turn the throt-
tle stop screw
1
in
a
.
To decrease idle speed
→
Turn the throt-
tle stop screw
1
out
b
.
5PA30240
EXHAUST PIPE INSPECTION
1. Inspect:
●
O-ring
1
Damage
→
Replace.
NOTE:
Install the O-rings with their depressed
a
fac-
ing inward.
5PA30250
PILOT AIR SCREW ADJUSTMENT/ENGINE IDLING
SPEED ADJUSTMENT/EXHAUST PIPE INSPECTION