Polini Sport 70cc high-performance cylinder kit engineered for Minarelli vertical engines.

 Built from durable cast iron with a robust two-ring piston design, this kit delivers exceptional power across the mid to high RPM range and handles demanding daily riding with proven reliability. Achieves approximately 8hp with optimal carburetor and exhaust configuration.

Complete kit includes 47mm cast iron cylinder with 5 transfer ports and oval exhaust port, two-ring piston with 10mm pin, high-compression aluminium cylinder head, mounting gasket set, and dual carbon fiber reed petals (0.35mm).