Yamaha YP250R X-MAX 2005 Service Information page 17

Item
Valve-stem-to-valve-guide clearance
Intake
Exhaust
Valve stem runout
Cylinder head valve seat width
Intake
Exhaust
Valve springs
Free length
Intake and exhaust (inner)
Intake and exhaust (outer)
Installed length (valve closed)
Intake
Exhaust
Compressed spring force (installed)
Intake and exhaust (inner)
Intake and exhaust (outer)
Spring tilt
Inner
Outer
ENGINE SPECIFICATIONS
Standard
0.010 ~ 0.037 mm (0.0004 ~ 0.0015 in)
0.025 ~ 0.052 mm (0.0010 ~ 0.0020 in)
----
0.90 ~ 1.10 mm (0.0354 ~ 0.0433 in)
0.90 ~ 1.10 mm (0.0354 ~ 0.0433 in)
38.10 mm (1.50 in)
36.93 mm (1.45 in)
30.10 mm (1.18 in)
30.10 mm (1.18 in)
76.5 ~ 88.3 N
(7.80 ~ 9.00 kg, 436.83 ~ 504.21 lb)
115 ~ 133 N
(11.7 ~ 13.5 kg, 655.47 ~ 756.31 lb)
----
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2 - 6
SPEC
Limit
0.080 mm
(0.0031 in)
0.100 mm
(0.0039 in)
0.010 mm
(0.0004 in)
1.6 mm
(0.06 in)
1.6 mm
(0.06 in)
36.10 mm
(1.42 in)
35.00 mm
(1.38 in)
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2.5°/1.7 mm
(2.5°/0.07 in)
2.5°/1.6 mm
(2.5°/0.06 in)