5 - 22
ENG
VALVES AND VALVE SPRINGS
4. Remove:
• valve retainer
1
• valve spring
2
• valve stem seal
3
• valve spring seat
4
• valve
5
NOTE:
Identify the position of each part very carefully
so that it can be reinstalled in its original place.
EAS00239
CHECKING THE VALVES AND VALVE
GUIDES
The following procedure applies to all of the
valves and valve guides.
1. Measure:
• valve-stem-to-valve-guide clearance
Out of specification
→
Replace the valve
guide.
Valve-stem-to-valve-guide clearance =
Valve guide inside diameter
a
–
Valve stem diameter
b
Valve-stem-to-valve-guide clear-
ance
Intake
0.010 ~ 0.037 mm
(0.0004 ~ 0.0015 in)
<Limit>: 0.080 mm (0.0031 in)
Exhaust
0.025 ~ 0.052 mm
(0.0010 ~ 0.0020 in)
<Limit>: 0.100 mm (0.0039 in)
2. Replace:
• valve guide
NOTE:
To ease valve guide removal and installation,
and to maintain the correct fit, heat the cylinder
head to 100 °C (212 °F) in an oven.
Summary of Contents for XP500
Page 1: ...2005 XP500 XP500A5VU5 AE1 SERVICE MANUAL...
Page 2: ......
Page 8: ......
Page 9: ...GEN INFO 1...
Page 11: ...GEN INFO...
Page 38: ...SPEC 2...
Page 40: ...SPEC...
Page 68: ...2 28 SPEC OIL FLOW DIAGRAMS 1 Oil strainer 2 Crankshaft...
Page 69: ...2 29 SPEC OIL FLOW DIAGRAMS 1 Clutch 2 Right main journal bearing 3 Main gallery plug...
Page 118: ......
Page 119: ...CHK ADJ 3...
Page 193: ......
Page 194: ...CHAS 4...
Page 198: ...CHAS...
Page 292: ...4 94 CHAS ANTI LOCK BRAKE SYSTEM XP500A...
Page 326: ......
Page 327: ...ENG 5...
Page 331: ...ENG...
Page 424: ...COOL 6...
Page 426: ...COOL...
Page 442: ......
Page 443: ...FI 7...
Page 445: ...FI...
Page 476: ...ELEC 8...
Page 544: ......
Page 545: ...TRBL SHTG 9...
Page 553: ......
Page 556: ......
Page 557: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN...