Pistons

The pistons are made of light alloy and are coated with graphite. There are grooves for two compression rings and one oil scraper ring. The top compression ring is flat and is molybdenum coated. The lower compression ring has an oil-scraper function and is wider than the upper one. The actual oil-scraper ring consists of three parts.
The piston pins are fitted in the piston and connecting rod and are full floating. The axial movement of the pin is limited by locking clips in the piston pin bore.