POLIN CYLINDER FOR RACE 1151412

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Polini 70 Evolution Cylinder Kit

<h3>Overview</h3>

<p>The <strong>Polini 70 Evolution Cylinder Kit</strong> is the most advanced tuning kit for <strong>MBK Booster</strong> and <strong>Yamaha Minarelli Vertical engines</strong>. Completely redesigned, it brings a new level of performance to this engine type. Thanks to exclusive engineering solutions never seen before on similar engines, it delivers maximum power, efficiency, and reliability.</p>

<h3>Technical Innovations</h3>

<p>The cylinder has been developed using advanced fluid-dynamic design to maximize airflow efficiency and torque delivery across the entire rev range.</p>

<ul>
<li><strong>Integrated reed valve housing</strong> with two dedicated ducts feeding directly into the transfer ports – an exclusive solution that improves torque and throttle response at low RPM.</li>
<li><strong>Four-petal reed valve</strong> (instead of the conventional two-petal design) supplied in the kit for faster and more efficient air/fuel mixture flow.</li>
<li><strong>Dedicated flow guide</strong> to channel air between the manifold and the reed valve, reducing turbulence and loss of pressure.</li>
<li><strong>360° rotatable intake manifold</strong>, compatible with <strong>Polini CP carburetors (17–24 mm)</strong>, offering full installation flexibility – suitable for both OEM and open air filters.</li>
<li><strong>Racing head with copper gasket</strong>, dual-ring piston, and base gaskets of 0.2 mm and 0.3 mm to fine-tune the squish clearance.</li>
</ul>

<h3>Available Versions</h3>

<ul>
<li><strong>166.0074/E</strong> – with 10 mm piston pin</li>
<li><strong>166.0074/12E</strong> – with 12 mm piston pin</li>
</ul>

<h3>Performance</h3>

<p>In its basic setup, the Polini 70 Evolution Cylinder Kit delivers around <strong>14 real horsepower</strong> with a strong and consistent torque curve across the rev range – a major improvement compared to traditional 70 cc cast-iron cylinders.</p>

<h3>Recommended Components for Maximum Performance</h3>

<ul>
<li><strong>Polini CP carburetor</strong> (19–24 mm)</li>
<li><strong>Polini For Race</strong> or <strong>Scooter Team exhaust system</strong></li>
<li><strong>High-speed transmission</strong></li>
</ul>

<p><strong>Part numbers:</strong> 166.0074/E &nbsp;|&nbsp; 166.0074/12E</p>

<p>&nbsp;</p>

<p><strong>APRILIA</strong>: AMICO 50 - SR 50 2T mod.1993<br>
<strong>ITALJET</strong>: BAZOOKA 1 50 - PISTA 50 1/2, YANKEE, SCOOP 2/3<br>
<strong>MBK</strong>: BOOSTER 50 - BOOSTER 50 dal 2004 -&gt; - BOOSTER 50 NEXT GENERATION - BOOSTER 50 R, ROCKET - BOOSTER 50 SPIRIT - BOOSTER 50 TRACK - STUNT 50<br>
<strong>YAMAHA</strong>: BW'S 50 dal 2004-&gt; - BW'S 50 NEXT GENERATION - BW'S 50 ZUMA - SLIDER 50 - SPY 50</p>