Piston -DMP- Piaggio Ciao, Bravo, Boxer, Si (gudgeon pin Ø=12mm) - 38.2mm

TIP: Always install piston rings carefully. Piston rings made of cast material are only elastic to a limited extent and break relatively quickly.
Some pistons have trapezoidally profiled piston rings (so-called keystoner rings), these only fit in one installation position. If the ring does not move freely, please loosen it carefully and reinstall it turned 'upside down'.