Cylinder Head Overall Specifications

Cylinder Head Maximum Overall Flatness Variation 0.076 mm (0.003 inch)
Cylinder Head Maximum Flatness Variation Over 25.4 mm (1.0 inch) 0.254 mm (0.001 inch)
Cylinder Head Maximum Flatness Variation Over 152.4 mm (6.0 inch)
Do Not Resurface If The Overall Measurement Is Less Than 0.076 mm (0.003 inch)
Resurface The Head If The Overall Measurement Is More Than 0.076 - 0.25 mm (0.003 - 0.010 inch)
Replace The Head If The Overall Measurement Is More Than 0.25 mm (0.010 inch)
Volume 58.9 cc - 60.1 cc (1.5825 oz. - 1.6501 oz.)
Runout 0.05 mm (0.00196 inch)
Valve Seat Diameter Intake 34.066 mm (1.3412 inch)
Exhaust 27.048 mm (1.1436 inch)
Intake Valve Guide ID 5.921 - 5.941 mm (0.2331 - 0.2339 inch)
Exhaust Valve Guide ID 5.908 - 5.928 mm (0.236 - 0.2335 inch)
Valve Stem To The Valve Guide Clearance Intake 0.024 - 0.070 inch (0.000986 - 0.00275 inch)
Exhaust 0.037 - 0.082 mm (0.00150 - 0.00320 inch)