POLIN CYLINDER FOR RACE 1123488

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<p><strong>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.</strong></p> <p><strong>POLINI EVOLUTION 3 CYLINDER KIT FOR YAMAHA-MINARELLI ENGINES:</strong><br>
<strong>GREAT PERFORMANCE TO BE THE NUMBER ONE</strong></p>
<p><br>
New Polini L/C “Evolution 3” aluminum kit for Yamaha and Minarelli engines . The 47,6<br>
cylinder is homologated to race in all the scooter championships of the world and it<br>
has the exhaust port with a bridge again. The design of the new bridge port allows the<br>
exhaust port to be much bigger which is very important to achieve maximum<br>
acceleration and more power at every rpm.<br>
The Cylinder head is made of two pieces, it is made with a central dome that works as<br>
the combustion chamber and a cover studied to better dissipate heat.<br>
It is possible to fit the kit without modifying the original cases.<br>
In order to achieve the best performance it is suggested to replace the crankshaft,<br>
even if it is not compulsory.</p>
<p><br>
TECHNICAL FEATURES:</p>
<ul>
<li>Power unit designed for high performance.</li>
<li>Increased displacement with bore of 47,6 mm.</li>
<li>Cylinder, light alloy die-cast</li>
<li>“Closed Deck” system for the internal flow of the coolant.</li>
<li>Cylinder liner with nickel-siliceous coating</li>
<li>Five exhaust transfers of brand new drawing.</li>
<li>Exhaust port of bigger dimensions with central bridge.</li>
<li>Better exhaust gas scavenging</li>
<li>Increase of the performance at high number of revolutions.</li>
<li>Piston, gravity cast in light alloy with high silicon content</li>
<li>Cast iron chromed piston rings "S10"</li>
<li>Head in light alloy.</li>
<li>Combustion chamber with specific squish to eliminate detonations.</li>
</ul>

<p>Code : 166.0113 – Sp. Ø 12<br>
Code : 166.0113/10 – Sp. Ø 10</p>