General Engine Specifications

Combustion Chamber Volume 47.1-50.1 cc
Valve Guide Bore Diameter
Intake and Exhaust 8.011-7.986 mm (0.315-0.314 in)
Tappet Bore Diameter 22.268-22.230 mm (0.8767-0.8752 in)
Camshaft Bore Inside Diameter
No 1 54.688-54.713 mm (2.1531-2.1541 in)
No 2 54.188-54.213 mm (2.1334-2.1344 in)
No 3 54.188-54.213 mm (2.1334-2.1344 in)
No 4 54.688-54.713 mm (2.1531-2.1541 in)
Gasket Surface Flatness 0.018 mm (0.0007 in)