Valve Seat

DIMENSIONS
Seat Replacement:
Intake Valve:
1st O.S. (marked 30) 0.30 mm (0.0120 inch)
Insert height 5.100-5.300 mm (0.2010-0.2090 inch)
Insert diameter 28.800-28.821 mm (1.1340-1.1350 inch)
2nd O.S. (marked 60) 0.60 mm (0.0240 inch)
Insert height 5.400-5.600 mm (0.2130-0.2200 inch)
Insert diameter 29.100-29.121 mm (1.1460-1.1470 inch)
Exhaust Valve:
1st O.S. (marked 30) 0.30 mm (0.0120 inch)
Insert height 5.900-6.100 mm (0.2320-0.2400 inch)
Insert diameter 34.300-34.325 mm (1.3500-1.3510 inch)
2nd O.S. (marked 60) 0.60 mm (0.0240 inch)
Insert height 6.200-6.400 mm (0.2440-0.2520 inch)
Insert diameter 34.60-34.625 mm (1.3620-1.3630 inch)
Seat Angles:
Upper Narrowing Angle 29°
Lower Narrowing Angle 73.5°
Seat Angle 45°
Seat Width:
Intake 0.80-1.20 mm (0.0310-0.0470 inch)
Exhaust 1.50-1.90 mm (0.0590-0.0750 inch)