Cilindrs Polini Evolution 3 70cc virzuļa tapa=12mm Yamaha Aerox / MBK Nitro

The last cylinder Polini produced for the “Evolution” series before they came out with their “Big Evo 2010”: Polini 70cc Cylinder Kit “Evolution 3”, 12mm, MBK Nitro / Aerox (Minarelli horizontal LC).

Komplektā ietilpst:
– 70cc Aluminium Cylinder “Evolution 3”, with 6 transfer ports and bridged exhaust port
- Viena gredzena virzuļa, 12 mm tapa
- Augstas kompresijas modulārā cilindra galva ar noņemamu sadegšanas kameru
- Blīvju komplekts montāžai un klīrensa klīrensa regulēšanai

3rd generation of Polini’s “Evolution” cylinders, the last one before the release of the new “Big Evo 20120” series.

The “Evolution 3” is based on the “Evolution 1” cylinders, but some features were modified, such as the redesigned two-part “bridged” exhaust port.

As a 70cc “Hyper Racing” kit, it is more powerful than its predecessors and, in combination with the right components (21-28mm carburetor and “Hyper Racing” exhaust), it can reach 18/19hp.

Note: the Polini 70cc Cylinder Kit “Evolution 3”, 12mm, MBK Nitro / Aerox is not street-legal.
Available here as 12mm piston pin version.