Dimension & Clearance Specifications - Cylinder Bore

Cylinder Bore (Mark 1) 81.000-81.010 mm (3.1890-3.1894 inches)
Cylinder Bore (Mark 2) 81.010-81.020 mm (3.1894-3.1898 inches)
Cylinder Bore (Mark 3) 81.020-81.030 mm (3.1898-3.1902 inches)
Cylinder Bore Limit (Standard) 81.23 mm (3.1980 inches)
Cylinder Bore Limit (Maximum) 81.73 mm (3.2177 inches)
Gasket Surface Distortion Specification 0.05 mm (0.0020 inches)