Piston: Specifications

Piston diameter - coded STD 100.380-100.400 mm (3.952-3.9528 in)
Piston diameter - coded 0.5 100.880-100.900 mm (3.972 in)
Piston diameter - coded 1.0 101.350-101.370 mm (3.990-3.991 in)
Piston-to-cylinder bore clearance 0.030-0.060 mm (0.0012-0.0023 in)
Piston top ring end gap 0.200-0.450 mm (0.008-0.018 in)
Piston bottom ring end gap 0.450-0.700 mm (0.018-0.028 in)
Piston top ring groove width 1.64-1.66 mm (0.0645-0.0654 in)
Piston bottom ring groove width 1.79-1.81 mm (0.0705-0.0713 in)
Piston oil ring groove width 3.5-3.53 mm (0.1378-0.1399 in)
Piston top ring width 1.578-1.598 mm (0.062-0.063 in)
Piston bottom ring width 1.728-1.74 mm (0.068-0.069 in)
Piston top ring-to-groove clearance 0.050-0.082 mm (0.002-0.003 in)
Piston bottom ring-to-groove clearance 0.050-0.082 mm (0.002-0.003 in)
Piston pin bore diameter (red) 24.007-24.010 mm (0.9451-0.9452 in)
Piston pin bore diameter (blue) 24.010-24.013 mm (0.9452-0.9453 in)