Yamaha SR125 1997, Service Manual

Page: 51 / 243

3-5
A B
VALVE CLEARANCE ADJUSTMENT/
IDLING SPEED ADJUSTMENT
INSP
ADJ
***************************************
14 Nm (1.4 m kg)
***************************************
10 Nm (1.0 m kg)
New
10 Nm (1.0 m kg)
New
18 Nm (1.8 m kg)
5. Adjust:
Valve clearance
Adjustment steps:
Loosen the locknut 1 .
Turn the adjuster 3 in or out with the valve ad-
justing tool 2 until specified clearance is ob-
tained.
Turning in Valve clearance is decreased.
Turning out Valve clearance is increased.
Valve adjusting tool:
90890-01311
Hold the adjuster to prevent it from moving and
tighten the locknut.
Measure the valve clearance.
If the clearance is incorrect, repeat above
steps until specified clearance is obtained.
6. Install:
Valve cover (intake side) 1
O-ring 2
Valve cover (exhaust side) 3
O-ring 4
A Intake side
B Exhaust side
7. Install:
Spark plug
Timing check window screw 1
(with O-ring)
Center plug 2
(with O-ring)
YP303022
IDLING SPEED ADJUSTMENT
1. Start the engine and let it warm up for several
minutes.
2. Attach:
Inductive tachometer to the spark plug lead.
Inductive tachometer:
90890-03113