Yamaha 2004 YXR660 Service Manual page 31

Item
Stem-to-guide clearance
Stem runout limit
Valve seat width
Valve spring
Inner spring
Free length
Set length (valve closed) IN
Compressed pressure
(installed)
Tilt limit
Direction of winding
(top view)
ENGINE SPECIFICATIONS
IN 0.010 ~ 0.037 mm
(0.0004 ~ 0.0015 in)
EX 0.025 ~ 0.052 mm
(0.0010 ~ 0.0020 in)
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IN 0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)
EX 0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)
IN 32.63 mm (1.28 in)
EX 36.46 mm (1.44 in)
27.5 mm (1.08 in)
EX 31.0 mm (1.22 in)
IN 100.0 ~ 115.7 N
(10.20 ~ 11.80 kg, 22.49 ~ 26.01 lb)
EX 120.6 ~ 138.3 N
(12.30 ~ 14.10 kg, 27.12 ~ 31.09 lb)
IN ----
EX ----
IN Clockwise
EX Clockwise
2 - 6
SPEC
Standard Limit
0.08 mm
(0.0031 in)
0.10 mm
(0.0039 in)
0.01 mm
(0.0004 in)
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31.0 mm
(1.22 in)
34.6 mm
(1.36 in)
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2.5°/1.4 mm
(2.5°/0.055 in)
2.5°/1.6 mm
(2.5°/0.063 in)
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