Polini Evolution 3 cylinder kit for Yamaha - Minarelli engines

Code: 166.0113

The new Polini cylinder kit for Yamaha-Minarelli "Evolution 3" engines is made up of an aluminum cylinder with a diameter of 47.6 mm approved in scooter championships all over the world. Equipped with a new design crossbar exhaust to obtain ever greater diagrams of the exhaust port with improved acceleration and more power at every engine rpm range. The warhead is composed of a central dome with dual function of combustion chamber and more efficient heat dissipation. The kit can be installed without modifying the original carter. For maximum performance it is recommended (not mandatory) to change the crankshaft.

Features:

• Specific for: MBK Nitro 50 1996> 2T water cooled
• Pin diameter 12
• Ultra performance.
• Increased displacement with bore of 47,6 mm
• Light alloy cylinder and head
• Oversized exhaust port with central crosspiece.
• Increase in performance at each regime.
• Gravity cast piston in light alloy with high silicon content.
• Combustion chamber with specific squish to eliminate detonations.

Suitable for: