Yamaha YZ125(T)/T1 Owner's Service Manual page 162

IDLE SPEED ADJUSTMENT/MUFFLER INSPECTION/
SILENCER FIBER REPLACEMENT
3-15
EC35M010
IDLE SPEED ADJUSTMENT
1. Start the engine and thoroughly warm it up.
2. Adjust:
9 Idle speed
Adjustment steps:
9 Loosen the locknut 1.
9 Turn the throttle stop screw 2 until the en-
gine runs at the lowest possible speed.
9 Tighten the locknut.
To increase idle speed ¡ Turn the throttle
To decrease idle speed ¡ Turn the throttle
EC35P030
MUFFLER INSPECTION
1. Inspect:
9 O-ring 1
Damage ¡ Replace.
NOTE:
Install the O-rings with their depressed a facing
outward.
EC35R050
SILENCER FIBER REPLACEMENT
1. Remove:
9 Side cover (right)
9 Bolt (silencer) 1
9 Silencer 2
9 Bolt (fiber) 3
INSP
ADJ
stop screw 2 2 in.
stop screw 2 2
out.