Valve Seat

Valve Seat Contact Width 0.9 - 1.3 mm (0.035 - 0.051 inch)
Oversize Intake Valve Seat Hole Diameter:
0.30 Oversize 31.80 - 31.83 mm (1.2520 - 1.2531 inch)
0.60 Oversize 32.10 - 32.13 mm (1.2638 - 1.2650 inch)
Oversize Exhaust Valve Seat Hole Diameter:
0.30 Oversize 29.30 - 29.32 mm (1.1535 - 1.1543 inch)
0.60 Oversize 29.60 - 29.62 mm (1.1654 - 1.1661 inch)