"Polini Cylinder Kit ""Evolution 3"" 70cc piston pin=10mm MBK Nitro / Aerox"

Details
This is the third edition of the Polini Evolution. It hasn't undergone any major changes, but the exhaust port has been completely revised and now features a bridged T-port instead of the Evo II's layout with two auxiliary exhaust ports. The combustion chamber basically remains unchanged, but the inner head cap has been given a new, thermally more efficient design. The finish quality is again top-notch. Comes with everything needed for installation.