Valve Specifications

Cylinder Head
Type DOHC - 4 Valves Per Cylinder
Material Aluminum
Combustion Chamber Volume 51.8 cc
Cylinder Head Flatness Maximum Without Resurfacing 0.05 mm (0.002 inch)
Worn Limit 0.20 mm (0.008 inch)
Valves
Clearance Between Stem and Guide, New Limits
Intake 0.028-0.068 mm (0.001-0.003 inch)
Exhaust 0.05-0.10 mm (0.002-0.004 inch)
Worn Limits, Not Over 0.12 mm (0.005 inch)
Head Diameter, Overall - Intake 33 mm (1.30 inch)
Exhaust 29 mm (1.14 inch)
Valve Face Angle 45°
Valve Seat Angle (In Head) 46°
Valve Seat Width - Intake 0.450-0.650 mm (0.017-0.033 inch)
Valve Seat Width - Exhaust 0.700-1.100 mm (0.027-0.043 inch)
Seat Eccentricity, Not Over (T.I.R.) 0.05 mm (0.002 inch)
Valve Face Runout 0.05 mm (0.002 inch)
Stem Diameter 5.9207-5.9411 mm (0.2331-0.2339 inch)
Valve Guide Diameter (In Head) 5.979 mm (0.235 inch)
Valve Length - Intake 105.89 mm (4.169 inch)
Valve Length - Exhaust 90.53 mm (3.564 inch)