Piston: Specifications

Piston and piston ring
Piston diameter
at 25.6 mm (1.008 inch) from the piston head 78.925 - 78.935 mm (3.1073 - 3.1077 inch)

Piston oil clearance
STD 0.065 - 0.088 mm (0.0026 - 0.0035 inch)
Maximum 0.10 mm (0.0039 inch)

Piston ring groove clearance 0.020 - 0.070 mm (0.0008 - 0.0028 inch)

Piston ring end gap
STD No.1 0.25 - 0.35 mm (0.0098 - 0.0138 inch)
No.2 0.35 - 0.50 mm (0.0138 - 0.0197 inch)
Oil (Side rail) 0.15 - 0.40 mm (0.0059 - 0.0157 inch)
Maximum No.1 1.05 mm (0.0413 inch)
No.2 1.20 mm (0.0472 inch)
Oil (side rail) 1.05 mm (0.0413 inch)