Polini's Corsa 70cc cylinder represents the next evolution in high-performance two-stroke engineering.

This cast iron unit delivers up to 13 hp through optimized port timing, enlarged transfer passages, and elevated compression — ideal for racing applications where maximum power extraction matters. Built for competition use only — not street legal. 

The kit includes a reinforced 47mm two-ring piston, high-quality small end bearing, and a high-compression head with direct scavenging for efficient combustion. Five transfer ports and an oval exhaust port maximize flow characteristics. Carbon reed petals, mounting studs, and a complete gasket set ensure straightforward installation. 

Spark plug thread = M14 long