Piston, Engine

GENERAL SPECIFICATIONS
Diameter (a)
Coated Grade 1 88.990-89.010 mm (3.5035-3.5043 in)
Coated Grade 2 88.998-89.022 mm (3.5039-3.5048 in)
Coated Grade 3 89.010-89.030 mm (3.5043-3.5051 in)
Uncoated Grade 1 88.970-88.980 mm (3.50275-3.50314 in)
Uncoated Grade 2 88.978-88.992 mm (3.50306-3.50362 in)
Uncoated Grade 3 89.010-89.030 mm (3.50432-3.50511 in)
Piston to Bore Clearance 0.012 to 0.022 mm (0.0005-0.0009 in)
Pin Bore Diameter 21.008-21.012 mm (0.8270-0.8272 in)
Ring Groove Width
Compression (Top) 1.230-1.245 mm (0.0484-0.0490 in)
Compression (Bottom) 1.530-1.545 mm (0.0602-0.0608 in)
Oil Ring 3.030-3.055 mm (0.1192-0.0120 in)

(a) Measured at 50 mm (1.9685 in) from outer perimeter top of piston to the pin axis.