Valve Guide: Specifications

VALVE STEM TO GUIDE CLEARANCE SPECIFICATION
Standard Value:
Intake 0.020-0.047 mm (0.0008-0.0019 inch)
Exhaust 0.050-0.085 mm (0.0020-0.0033 inch)
Wear Limit:
Intake 0.10 mm (0.0040 inch)
Exhaust 0.15mm (0.0059 inch)

OVERSIZE SPECIFICATIONS
1st Oversize (marked 5)
Guide Oversize 0.05 mm (0.002 inch)
Cylinder Head Bore 12.050-12.068 mm (0.4744-0.4751 inch)
2nd Oversize (marked 25)
Guide Oversize 0.25 mm (0.010 inch)
Cylinder Head Bore 12.250-12.268 mm (0.4823-0.4830 inch)
3rd Oversize (marked 50)
Guide Oversize 0.50 mm (0.020 inch)
Cylinder Head Bore 12.500-12.518 mm (0.4921-0.4928 inch)

LENGTH
Intake 45.50 mm (1.7910 inch)
Exhaust 50.50 mm (1.9880 inch)