July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Piston, Engine
Pistons 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 0.010-0.030 mm