Valve Seat

EXHAUST VALVE SEAT RING HOLE DIAMETER (OVERSIZE)
1st O.S. 0.3 (0.012) 38.300 - 38.325 mm (1.5079 - 1.5089 in.)
2nd O.S. 0.6 (0.024) 38.600 - 38.625 mm (1.5197 - 1.5207 in.)

INTAKE VALVE SEAT RING HOLE DIAMETER (OVERSIZE)
1st O.S. 0.3 (0.012) 44.300 - 44.325 mm (1.7441 - 1.7451 in.)
2nd O.S. 0.6 (0.024) 44.600 - 44,625 mm (1.7559 - 1.7569 in.)

VALVE SEAT CONTACT WIDTH
Standard Value:
Exhaust 0.9 - 1.3 mm (0.035 - 0.051 in.)
Intake 0.9 - 1.3 mm (0.035 - 0.050 in.)