Dimension & Clearance Specifications - Piston

Piston to Cylinder Bore Clearance 0.02-0.04 mm (0.0008-0.0015 inch)
Piston Diameter
Original Piston 73.970-73.990 mm (2.9122-2.9130 inch)
0.25 mm (0.0098 inch) Oversize Piston 74.220-74.230 mm (2.9220-2.9224 inch)
0.50 mm (0.0197 inch) Oversize Piston 74.470-74.480 mm (2.9319-2.9323 inch)
Piston Ring End Gap:
Top Ring (Standard) 0.2-0.3 mm (0.0079-0.0118 inch)
Top Ring (Maximum Limit) 0.7 mm (0.0276 inch)
Second Ring (Standard) 0.2-0.3 mm (0.0079-0.0118 inch)
Second Ring (Maximum Limit) 0.7 mm (0.0276 inch)
Oil Ring (Standard) 0.2-0.6 mm (0.0079-0.0275 inch)
Oil Ring (Maximum Limit) 1.8 mm (0.0708 inch)
Piston Ring Groove Clearance:
First Ring 0.03-0.07 mm (0.0012-0.0027 inch)
Second Ring 0.02-0.06 mm (0.0008-0.0023 inch)