Pilot Air Screw Adjustment; Engine Idling Speed Adjustment; Exhaust Pipe Inspection - Yamaha YZ85( P) /LC Owner's Service Manual

PILOT AIR SCREW ADJUSTMENT/ENGINE IDLING
SPEED ADJUSTMENT/EXHAUST PIPE INSPECTION

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 factry. Before
5PA30230
adjusting the pilot air screw, turn it in fully and
count the number of turns. Record this num-
ber as the factry-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.

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
5PA30240
tle stop screw 1 in a.
To decrease idle speed
tle stop screw 1 out b.

EXHAUST PIPE INSPECTION

1. Inspect:
O-ring 1
Damage
NOTE:
Install the O-rings with their depressed a fac-
ing inward.
5PA30250
3 - 14
INSP
ADJ
Pilot air screw:
2 turns out (example)
Replace.
Turn the throt-
Turn the throt-