Rebuild Specifications

Cylinder Head
Combustion Chamber Volume 64.55-67.45cc
Valve Arrangement EI-IE-IE-EI-EI-IE
Valve Guide ID (Integral) 7.9 mm (0.312 in.)
Valve Stem-to-Guide Clearance 0.03-0.08 mm (0.001-0.003 in.)
Intake Valve Seat Angle 44.5°
Exhaust Valve Seat Angle 44.5°
Valve Seat Width 1.02-1.52 mm (0.040-0.060 in.)
Valve Seat Runout 0.064 mm (0.0025 in.)
Flatness,
0.03 mm per 25 mm (0.001 in per 1 in)
0.05 mm per 152 mm (0.002 in per 6 in)
Maximum For Total Length 0.20 mm (0.008 in.)