Valve Seat

Valve Seat Contact Width 0.9 - 1.3 mm (0.035 - 0.051 inch)
Oversize Intake Valve Seat Ring Hole Diameter:
Primary:
0.3 Oversize 27.300 - 27.325 mm (1.0748 - 1.0758 inch)
0.6 Oversize 27.600 - 27.625 mm (1.0866 - 1.0876 inch)
Secondary:
0.3 Oversize 32.300 - 32.325 mm (1.2717 - 1.2726 inch)
0.6 Oversize 32.600 - 32.625 mm (1.2835 - 1.2845 inch)
Oversize Exhaust Valve Seat Ring Hole Diameter:
0.3 Oversize 35.300 - 35.325 mm (1.3898 - 1.3907 inch)
0.6 Oversize 35.600 - 35.625 mm (1.4016 - 1.4026 inch)