Yamaha XV16AL, Service Manual

Page: 23 / 449

ENGINE SPECIFICATIONS
SPEC
2 - 5
Valve margin thickness D
Intake 0.7 ~ 1.3 mm (0.028 ~ 0.051 in) 0.4 mm
(0.016 in)
Exhaust 0.7 ~ 1.3 mm (0.028 ~ 0.051 in) 0.4 mm
(0.016 in)
Valve stem diameter
Intake 5.975 ~ 5.990 mm (0.2352 ~ 0.2358 in) 5.945 mm
(0.2341 in)
Exhaust 5.960 ~ 5.975 mm (0.2346 ~ 0.2352 in) 5.920 mm
(0.2331 in)
Valve guide inside diameter
Intake 6.000 ~ 6.012 mm (0.2362 ~ 0.2367 in) 6.05 mm
(0.2382 in)
Exhaust 6.000 ~ 6.012 mm (0.2362 ~ 0.2367 in) 6.05 mm
(0.2382 in)
Valve stem-to-valve guide clear-
ance
Intake 0.010 ~ 0.037 mm (0.0004 ~ 0.0015 in) 0.08 mm
(0.0031 in)
Exhaust 0.025 ~ 0.052 mm (0.0010 ~ 0.0020 in) 0.1 mm
(0.004 in)
Valve stem runout ---- 0.01 mm
(0.0004 in)
Valve seat width
Intake 0.9 ~ 1.1 mm (0.035 ~ 0.043 in) ----
Exhaust 0.9 ~ 1.1 mm (0.035 ~ 0.043 in) ----
Valve springs
Inner springs
Free length
Intake 38.26 mm (1.51 in) 36.26 mm
(1.43 in)
Exhaust 38.26 mm (1.51 in) 36.26 mm
(1.43 in)
Installed length (valve closed)
Intake 29.0 mm (1.14 in) ----
Exhaust 29.0 mm (1.14 in) ----
Compressed spring force
(installed)
Intake 63 ~ 73 N (6.3 ~ 7.3 kgf, 13.9~ 16.1 lb) ----
Exhaust 63 ~ 73 N (6.3 ~ 7.3 kgf, 13.9~ 16.1 lb) ----
Item Standard Limit
2