Gruppo termico POLINI H2O Ø 47,6 EVOL.3

Products reserved exclusively for competitions in designated areas, in accordance with the provisions of the competent sports authorities. We assume no responsibility for improper use.

POLINI EVOLUTION 3 CYLINDER KIT FOR YAMAHA-MINARELLI ENGINES:
GREAT PERFORMANCE TO BE THE NUMBER ONE

New Polini L/C “Evolution 3” aluminum kit for Yamaha and Minarelli engines . The 47,6
cylinder is homologated to race in all the scooter championships of the world and it
has the exhaust port with a bridge again. The design of the new bridge port allows the
exhaust port to be much bigger which is very important to achieve maximum
acceleration and more power at every rpm.
The Cylinder head is made of two pieces, it is made with a central dome that works as
the combustion chamber and a cover studied to better dissipate heat.
It is possible to fit the kit without modifying the original cases.
In order to achieve the best performance it is suggested to replace the crankshaft,
even if it is not compulsory.

TECHNICAL FEATURES:

• Power unit designed for high performance.
• Increased displacement with bore of 47,6 mm.
• Cylinder, light alloy die-cast
• “Closed Deck” system for the internal flow of the coolant.
• Cylinder liner with nickel-siliceous coating
• Five exhaust transfers of brand new drawing.
• Exhaust port of bigger dimensions with central bridge.
• Better exhaust gas scavenging
• Increase of the performance at high number of revolutions.
• Piston, gravity cast in light alloy with high silicon content
• Cast iron chromed piston rings "S10"
• Head in light alloy.
• Combustion chamber with specific squish to eliminate detonations.

Code : 166.0113 – Sp. Ø 12
Code : 166.0113/10 – Sp. Ø 10