Valve, Intake/Exhaust
SPECIFICATIONValve
Overall length
Intake
Specification 106.28 mm (4.184 inch)
Limit 105.78 mm (4.164 inch)
Exhaust
Specification 105.4 mm (4.150 inch)
Limit 104.9 mm (4.130 inch)
Stem diameter
Intake 6.565 - 6.580 mm (0.258 - 0.259 inch)
Exhaust 6.530 - 6.550 mm (0.257 - 0.258 inch)
Face angle 45° - 45.5°
Margin
Intake
Specification 1.0 mm (0.0394 inch)
Limit 0.5 mm (0.0197 inch)
Exhaust
Specification 1.5 mm (0.059 inch)
Limit 0.8 mm (0.0315 inch)
Clearance (stem-to-guide)
Intake
Specification 0.02 - 0.05 mm (0.0009 - 0.0020 inch)
Limit 0.1 mm (0.0039 inch)
Exhaust
Specification 0.05 - 0.085 mm (0.0020 - 0.0033 inch)
Limit 0.15 mm (0.0059 inch)