Valve Seat
DIMENSIONSStem Projection [1]
Standard Value:
Intake 49.30 mm (1.9409 inch)
Exhaust 49.35 mm (1.9429 inch)
Limit:
Intake 49.80 mm (1.9606 inch)
Exhaust 49.85 mm (1.9626 inch)
Intake Valve Seat Hole Diameter:
0.3 O.S. 31.80 - 31.83 mm (1.2520 - 1.2531 inch)
0.6 O.S. 32.10 - 31.13 mm (1.2638 - 1.2650 inch)
Exhaust Valve Seat Hole Diameter:
0.3 O.S. 29.30 - 29.32 mm (1.1535 - 1.1543 inch)
0.6 O.S. 29.60 - 29.62 mm (1.1654 - 1.1661 inch)
[1]: Between the end of the valve stem and the spring seating surface