Yamaha 2004 Rhino 660 YXR660FAS, Service Manual, Page: 35 / 421

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