Cylinder Head Assembly: Specifications

DIMENSIONS
Combustion Chamber Volume: 59.7-67.7 cubic cm
Valve Guide Bore Diameter: 8.745-8.720 mm (0.3443-0.3433 inches)
Valve Seats
Width (Intake And Exhaust): 1.5-2.0 mm (0.06-0.08 in)
Angle: 44.75°
Runout (T.I.R.): 0.076 mm (0.003 in)
Bore Diameter (Insert Counterbore Diameter)
Intake (Max): 47.097 mm (1.8542 inches)
Intake (Min): 47.072 mm (1.8532 inches)
Exhaust (Max): 39.739 mm (1.5645 inches)
Exhaust (Min): 39.714 mm (1.5635 inches)
Gasket Surface Flatness: 0.018 mm (0.007 inch)
Max. Allowable Stock Removal
of ORIGINAL Gasket Surface: 0.254mm (0.010 in)
Valve Stem To Guide Clearance
Intake: 0.026-0.071 mm (0.001-0.0028 inch)
Exhaust: 0.038-0.083 mm (0.0015-0.0033 inch)