ENGINE (YP250R)
3-22
d. Measure the valve clearance with a thickness
gauge “1”.
Out of specification
→
Adjust.
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6. Adjust:
• Valve clearance
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a. Loosen the locknut “1”.
b. Insert a thickness gauge “2” between the end
of the adjusting screw and the valve tip.
c. Turn the adjusting screw “3” in direction “a” or
“b” with the tappet adjusting tool “4” until the
specified valve clearance is obtained.
d. Hold the adjusting screw to prevent it from
moving and tighten the locknut to specifica-
tion.
e. Measure the valve clearance again.
f. If the valve clearance is still out of specifica-
tion, repeat all of the valve clearance adjust-
ment steps until the specified clearance is
obtained.
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7. Install:
• Timing mark accessing plug
(along with the O-ring
)
• Camshaft sprocket cover
(along with the O-ring
)
• Tappet covers
(along with the O-rings
)
• Spark plug
• Spark plug cap
8. Install:
• V-belt case air filter cover
9. Install:
• Storage box
Refer to “GENERAL CHASSIS” on page 4-1.
Direction “a”
Valve clearance is increased.
Direction “b”
Valve clearance is decreased.
1
1
2
Tappet adjusting tool
90890-01311
Six piece tappet set
YM-A5970
T
R
.
.
Locknut (valve clearance adjust-
ing screw)
14 Nm (1.4 m·kgf, 10 ft·lbf)
T
R
.
.
Timing mark accessing plug
8 Nm (0.8 m·kgf, 5.8 ft·lbf)
Camshaft sprocket cover
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Tappet cover
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Spark plug
18 Nm (1.8 m·kgf, 13 ft·lbf)
3
b
a
b
a
4
New
New
New
Summary of Contents for YP125R
Page 1: ...SERVICE MANUAL 2010 37P F8197 E0 YP125R YP250R...
Page 6: ......
Page 8: ......
Page 28: ...SPECIAL TOOLS 1 19...
Page 30: ...COOLING SYSTEM DIAGRAMS YP250R 2 73 CABLE ROUTING YP250R 2 75...
Page 31: ......
Page 55: ...LUBRICATION POINTS AND LUBRICANT TYPES YP125R 2 24...
Page 62: ...CABLE ROUTING YP125R 2 31 Front fork front view A 1 1 1 1 2 2 2 3 4 5 6 7...
Page 66: ...CABLE ROUTING YP125R 2 35 Engine right side view A 7 3 2 2 2 1 3 4 5 6 7...
Page 70: ...CABLE ROUTING YP125R 2 39 Engine left side view 2 1 3 4 A 3...
Page 72: ...CABLE ROUTING YP125R 2 41 Handlebar top view A 1 2 3 4 4 5 6 7 8 9 10 11 12 13 14 15 16 17...
Page 76: ...CABLE ROUTING YP125R 2 45 Tail brake light top view 2 1 3 4 B A 1 5 6...
Page 103: ...LUBRICATION POINTS AND LUBRICANT TYPES YP250R 2 72...
Page 108: ...CABLE ROUTING YP250R 2 77 Front fork front view 1 1 2 3 4 5 6 7 1 2 A 1 2...
Page 112: ...CABLE ROUTING YP250R 2 81 Engine right side view A 7 3 2 2 2 1 3 4 5 6 7 8 B...
Page 116: ...CABLE ROUTING YP250R 2 85 Engine left side view 2 1 3 4 5 6 B A 3 7...
Page 118: ...CABLE ROUTING YP250R 2 87 Handlebar top view A 1 2 3 4 4 5 6 7 8 8 9 10 11 12 13 14 15 16 17...
Page 122: ...CABLE ROUTING YP250R 2 91 Tail brake light top view 2 1 3 4 B A 1 5 6 8 7...
Page 124: ...CABLE ROUTING YP250R 2 93...
Page 127: ......
Page 172: ...ELECTRICAL SYSTEM 3 45...
Page 175: ......
Page 240: ...REAR SHOCK ABSORBER ASSEMBLIES AND SWINGARM 4 65...
Page 245: ......
Page 305: ...CRANKSHAFT YP125R 5 60 a 1...
Page 366: ...CRANKSHAFT YP250R 5 121...
Page 394: ...THROTTLE BODY 7 11...
Page 397: ......
Page 411: ...CHARGING SYSTEM 8 14...
Page 423: ...SIGNALING SYSTEM 8 26...
Page 427: ...COOLING SYSTEM 8 30...
Page 453: ...FUEL INJECTION SYSTEM 8 56...
Page 457: ...FUEL PUMP SYSTEM 8 60...
Page 466: ...IMMOBILIZER SYSTEM 8 69 a Light on b Light off...
Page 467: ...IMMOBILIZER SYSTEM 8 70...
Page 495: ......
Page 496: ...YAMAHA MOTOR ESPA A S A...