Yamaha RX10RTW, Supplementary Service Manual

Page: 82 / 163

SPEC
37
Head Diameter
Face Width
Seat Width
Margine Thickness
Model RX10RTW, RX10RTRW, RXW10GTW, RX10MSW
Valve dimensions:
Valve head diameter A
Intake 22.9 ~ 23.1 mm (0.9016 ~ 0.9094 in)
Exhaust 24.4 ~ 24.6 mm (0.9606 ~ 0.9685 in)
Valve face width B
Intake 1.76 ~ 2.90 mm (0.0693 ~ 0.1142 in)
Exhaust 1.76 ~ 2.90 mm (0.0693 ~ 0.1142 in)
Valve seat width C
Intake 0.9 ~ 1.1 mm (0.035 ~ 0.043 in)
Exhaust 0.9 ~ 1.1 mm (0.035 ~ 0.043 in)
Valve margin thickness D
Intake 0.5 ~ 0.9 mm (0.020 ~ 0.035 in)
Exhaust 0.5 ~ 0.9 mm (0.020 ~ 0.035 in)
Valve stem diameter
Intake 3.975 ~ 3.990 mm (0.1565 ~ 0.1571 in)
<Limit> 3.945 mm (0.1553 in)
Exhaust 4.465 ~ 4.480 mm (0.1758 ~ 0.1764 in)
<Limit> 4.43 mm (0.1744 in)
Valve guide inside diameter
Intake 4.000 ~ 4.012 mm (0.1575 ~ 0.1580 in)
<Limit> 4.05 mm (0.1594 in)
Exhaust 4.500 ~ 4.512 mm (0.1772 ~ 0.1776 in)
<Limit> 4.55 mm (0.1791 in)
Valve-stem-to-valve-guide clearance
Intake 0.010 ~ 0.037 mm (0.0004 ~ 0.0015 in)
<Limit> 0.08 mm (0.0031 in)
Exhaust 0.020 ~ 0.047 mm (0.0008 ~ 0.0019 in)
<Limit> 0.10 mm (0.0039 in)
Valve stem runout limit 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)
MAINTENANCE SPECIFICATIONS