July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Piston, Engine
Piston diameter. class 1 84.770 - 84.780 mm Piston diameter, class 2 84.780 - 84.790 mm Piston diameter, class 3 84.790 - 84.800 mm Piston clearance in cylinder bore 0.010 - 0.030 mm