Valve: Specifications

Valve Guide Inside Diameter 5.500-5.512 mm (0.2165-0.2170 inch)
Valve Head Thickness Intake Valves
Standard 1.0 mm (0.039 inch)
Minimum Limit 0.6 mm (0.02 inch)
Valve Head Thickness Exhaust Valves
Standard 1.2 mm (0.047 inch)
Minimum Limit 0.7 mm (0.027 inch)
Valve Seat Contact Width Int and Exh 1.30-1.50 mm (0.0512-0.0590)
Valve Stem Outside Diameter
Intake Valves 5.457-5.480 mm (0.2148-0.2157 inch)
Exhaust Valves 5.440-5.455 mm (0.2142-0.2148 inch)
Valve Stem Radial Runout (minimum) Int and Exh 0.08 mm (0.003 inch)
Valve Stem-to-Valve Guide Clearance
Intake Valves (Standard) 0.020-0.055 mm (0.0008-0.0022 inch)
Intake Valves (Maximum Limit) 0.070 mm (0.0027 inch)
Valve Stem-to-Guide Clearance
Exhaust Valves (Standard) 0.045-0.072 mm (0.0018-0.0028 inch)
Exhaust Valves (Maximum Limit) 0.090 mm (0.0035 inch)
Valve Spring Free Length
Standard 42.29 mm (1.6649 inch)
Limit (minimum) 41.00 mm (1.6142 inch)
Valve Spring Preload
Standard 20.9-23.5 kg at 32.6 mm (46.1-51.8 lbs. at 1.28 inch)
Valve Spring Squareness Deviation (Maximum) 2.0 mm (0.079 inch)