Piston

* Diameter:
Grade 1, Coated 88.990-89.010 mm (3.50354-3.50432 inch)
Grade 2, Coated 88.998-89.022 mm (3.50386-3.50480 inch)
Grade 3, Coated 89.010-89.030 mm (3.50432-3.50511 inch)
Grade 1, Uncoated 88.970-88.980 mm (3.50257-3.50314 inch)
Grade 2, Uncoated 88.978-88.992 mm (3.50306-3.50362 inch)
Grade 3, Uncoated 89.010-89.030 mm (3.50432-3.50511 inch)
Piston-to-Bore Clearance 0.012-0.022 mm (0.0005-0.0009 inch)
Piston Pin Bore 21.008-21.012 mm (0.8270-0.8272 inch)
Ring Groove Width:
Compression, Top 1.230-1.245 mm (0.0484-0.0490 inch)
Compression, Bottom 1.530-1.545 mm (0.0602-0.0608 inch)
Oil 3.030-3.055 mm (0.1192-0.0120 inch)

* Measured at 50 mm (2 inch) from outer perimeter top of piston to the pin axis.