General Specifications
| Valve Guide Bore Diameter | Intake and Exhaust | 8.720-8.745 mm (0.3433-0.3443 in) |
| Valve Bore Diameter (Insert Counterbore Diameter) | Intake (Max.) | 47.097 mm (1.8542 in) |
| Intake (Min.) | 47.072 mm (1.8532 in) | |
| Exhaust (Max.) | 39.730 mm (1.5645 in) | |
| Gasket Surface Flatness | 0.08 mm (0.003 in) over 152.0 mm (6.00 in) | |
| Combustion Chamber Volume | 47.1-50.1 cc (2.874 ci) |