Valve Seat

Measure Distance Between Top Of Valve & Top Surface Of Cylinder Head:

MINIMUM DIMENSION (Valve Stem to Head):
Intake: 34.4 mm (1.354 in.)
Exhaust: 34.7 mm (1.366 in.)

Valve Seat, Intake:

Valve Seat, Exhaust:

VALVE SEAT DIMENSIONS:
Diameter (a):
Intake: 31.2 mm (1.228 in.)
Exhaust: 27.6 mm (1.087 in.)
Maximum Permissible Refacing Depth (b): calculate
Seat Width (c):
Intake: 1.5-1.8 mm (0.06-0.07 in.)
Exhaust: approx. 1.8 mm (0.07 in.)
Valve Seat Angle: 45°
Upper Correction Angle: 30°
Lower Correction Angle: 75°