Yamaha RX10RTW, Supplementary Service Manual

Page: 83 / 163

SPEC
38
Model RX10RTW, RX10RTRW, RXW10GTW, RX10MSW
Valve spring:
Free length
Intake 43.59 mm (1.72 in)
Exhaust 40.62 mm (1.60 in)
Installed length (valve closed)
Intake 34.50 mm (1.36 in)
Exhaust 35.00 mm (1.38 in)
Compressed spring force (installed)
Intake 126 ~ 146 N (12.8 ~ 14.9 kg, 28.3 ~ 32.8 lb)
Exhaust 111 ~ 127 N (11.3 ~ 12.9 kg, 24.9 ~ 28.5 lb)
Spring tilt
Intake 2.5°/1.9 mm (0.075 in)
Exhaust 2.5°/1.8 mm (0.071 in)
Winding direction (top view)
Intake Clockwise
Exhaust Clockwise
Valve lifter:
Valve lifter outside diameter
Intake 19.982 ~ 19.988 mm (0.7867 ~ 0.7869 in)
<Limit> 19.957 mm (0.7857 in)
Exhaust 22.482 ~ 22.488 mm (0.8851 ~ 0.8854 in)
<Limit> 22.457 mm (0.8841 in)
Valve lifter hole inside diameter
Intake 20.000 ~ 20.018 mm (0.7874 ~ 0.7881 in)
<Limit> 20.048 mm (0.7893 in)
Exhaust 22.500 ~ 22.518 mm (0.8858 ~ 0.8865 in)
<Limit> 22.548 mm (0.8877 in)
Piston:
Piston size (D) 73.955 ~ 73.970 mm (2.9116 ~ 2.9122 in)
Measuring point (H) 5 mm (0.20 in)
Piston to-cylinder clearance 0.030 ~ 0.055 mm (0.0012 ~ 0.0022 in)
<Limit> 0.12 mm (0.0047 in)
Piston pin bore off set 0.5 mm (0.0197 in)
Off-set direction Intake side
Piston pin bore inside diameter 17.002 ~ 17.013 mm (0.6694 ~ 0.6698 in)
Piston pin:
Piston pin outside diameter 16.991 ~ 17.000 mm (0.6689 ~ 0.6693 in)
Piston pin length 51.4 ~ 51.5 mm (2.0236 ~ 2.0276 in)
Piston pin to piston pin bore clearance 0.002 ~ 0.022 mm (0.00008 ~ 0.0009 in)
<Limit>
0.072 mm (0.0028 in)
MAINTENANCE SPECIFICATIONS