Cylinder Stage6 Sport 70cc. The first generation Sport MK1 cylinders became very popular among scooter tuners, then Stage6 took things to the next level and introduced the successor, the Sport MKII.
The Stage6 Sport cylinders are available for 50cc scooters (Piaggio, Minarelli; CPI) as well as 50cc supermotos (AM6, Derbi).
The cylinder was completely redesigned; 6 instead of 5 transfer ports ensure optimized cylinder filling. The oval exhaust remained but was optimized as well. The head is a one-piece unit with cast scavenging canals for better heat dissipation. The piston is a replica of the R/T piston, with a domed piston crown and 0.8 mm thick piston ring to optimise performance and improve thermal stability.
The cylinder delivers 2 to 3 hp more power than the MK1, between 14-17 hp, without any additional modifications and in combination with the corresponding components. Maximum performance and outstanding robustness – we are sure that this cylinder will set new standards in the tuning scene.
The 50cc version of the Sport Pro cylinder is a street to midrace cylinder with 2 piston rings, with a large volume cooling system so that engine can be cooled efficiently while riding.