Piston, Engine

Piston Dimensions and Clearance:
With Standard Piston Diameter 79.47 mm
Cylinder Bore Diameter 79.51 mm
With 1st Oversize Piston Diameter 79.72 mm
Cylinder Bore Diameter 79.76 mm
With 2nd Oversize Piston Diameter 79.97 mm
Cylinder Bore Diameter 80.01 mm

Piston Ring Groove Clearance:
New:
1st Compression Ring 0.06-0.09 mm (0.0024-0.0036 inch)
2nd Compression Ring 0.05-0.08 mm (0.0020-0.0032 inch)
Oil Scraper Ring 0.03-0.06 mm (0.0012-0.0024 inch)
Wear Limit:
1st Compression Ring 0.25 mm (0.0098 inch)
2nd Compression Ring 0.25 mm (0.0098 inch)
Oil Scraper Ring 0.15 (0.0059 inch)

Piston Ring End Gap:
New:
1st Compression Ring 0.20-0.40 mm (0.0078-0.0157 inch)
2nd Compression Ring 0.20-0.40 mm (0.0078-0.0157 inch)
Oil Scraper Ring 0.25-0.50 mm (0.0098-0.01974 inch)
Wear Limit:
1st Compression Ring 1.0 mm (0.039 inch)
2nd Compression Ring 1.0 mm (0.039 inch)
Oil Scraper Ring 1.0 mm (0.039 inch)