Piston ring -POLINI cast iron- Vespa 177cc - Vespa PX125, PX150, Cosa125, Cosa150, GTR, TS125, Sprint Veloce - 63.4mm

TIP: Please always mount the piston rings carefully. Piston rings made of cast material have only limited elasticity and break relatively quickly.
Some pistons have trapezoidally profiled piston rings (so-called keystone rings), these only fit in one installation position. If the ring does not move freely, please loosen it carefully and reinstall it upside down.
are very helpful tools for working on the cylinder and/or piston:

• Piston ring compressor -BUZZETTI- Ø=45-90mm BU5040
• Piston ring pliers BU5045
• Dismantling tool for piston pin -UNIVERSAL- Ø=13, 15, 16, 19, 22mm 7674333
• impact pin for piston pin -UNIVERSAL Ø=10mm/14,5mm 7674725