Valve, Intake/Exhaust

Dimensional Specifications





Valve Crown Diameter (A)
Inlet 31.00 ± 0.15 mm
Exhaust 27.00 ± 0.15 mm
Valve Stem:
Diameter (B)
Inlet:
Early Version 6.970 +0.0 / -0.015 mm
Late Version 5.970 +0.0 / -0.015 mm
Diameter (B1/B2):
Exhaust:
Early Version:
H1 17.4 mm
H2 70.4 mm
B1 6.963 ± 0.007 mm
B2 6.953 ± 0.007 mm
Late Version:
H1 22.7 mm
H2 65.1 mm
B1 5.962 ± 0.007 mm
B2 5.954 ± 0.007 mm
Total Valve Length (C)
Inlet 102.00 ± 0.07 mm
Exhaust 101.05 ± 0.07 mm
Disc Edge Height (D)
Inlet and Exhaust:
Standard 1.50 mm
Minimum After Grinding 1.20
Valve Angle
Inlet and Exhaust 44.5°






Valve Stem Vertical Position
Valve Stem Height 48.4 ± 0.50 mm