Valve, Intake/Exhaust

SPECIFICATION
Valve
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)