Valve Seat

Intake valve seat ring hole diameter
0.3 (0.012) O.S. 36.30 - 36.325 mm (1.429 - 1.430 inch)
0.6 (0.024) O.S. 36.60 - 36.625 mm (1.441 - 1.442 inch)

Exhaust valve seat ring hole diameter
0.3 (0.012) O.S. 33.30 - 33.325 mm (1.311 - 1.312 inch)
0.6 (0.024) O.S. 33.60 - 33.625 mm (1.323 - 1.324 inch)

Valve seat contact width
Intake 0.9 - 1.3 mm (0.035 - 0.051 inch)
Exhaust 0.9 - 1.3 mm (0.035 - 0.051 inch)
Service oversize 0.30, 0.60

Seat angle
Intake 43.5 - 44.0°
Exhaust 43.5 - 44.0°