Piston, Engine

Pistons
Type Material Aluminum (Full Floating Pins)
Piston Diameter 95.98 ± 0.019 mm (3.7788 ± 0.0008 in.)
Clearance at Size Location -0.007 to +0.047 mm (-0.0003 to +0.0018 in.)

Piston Weight
A Size 438-443 grams (15.45-15.62 oz.)
B Size 433-438 grams (15.27-15.45 oz.)

Piston Pins
Type Full Floating
Clearance in Piston 0.005-0.015 mm (0.0002-0.0006 in.)
Clearance in Rod 0.007-0.018 mm (0 0003-0.007 in.)
Diameter 23.997-24.000 mm (0.9448-0.9449 in.)

Piston Rings
Ring Gap-Top Compression Ring 0.20-0.36 mm (0.008-0.014 in.)
Ring Gap-2nd Compression Ring 0.23-0.50 mm (0.0091-0.0197 in.)
Ring Gap-Oil Control (Steel Rails) 0.25-0.76 mm (0.010-0.030 in.)

Ring Side Clearance
Top and Second Compression Ring 0.04-0.08 mm (0.0016-0.0031 in.)
Oil Ring (Steel Rails) 0.038-0.184 mm (0.0015-0.0073 in.)

Ring Width
Top Compression Ring 1.17-1.19 mm (0.0461-0.0469 in.)
2nd Compression Ring 1.47-1.49 mm (0.058-0.059 in.)
Oil Ring (Steel Rings) 0.445-0.470 mm (0.0176-0.0186 in.)

Piston Ring Groove Diameter
No. 1 87.4-87.6 mm (3.441-3.449 in.)
No. 2 86.3-86.5 mm (3.397-3.4055 in.)
No. 3 85.8-86.0 mm (3.378-3.385 in.)