POLIN VARIATOR COVER YAMAHA HOR. BLK EVO 1125925

Popis produktu

<p><strong>BIG EVOLUTION CRANKCASE for HORIZONTAL YAMAHA MINARELLI ENGINES</strong></p>
<p><br>The Big Evolution crankcase for Horizontal Yamaha Minarelli engines presents two<br>main features. The most important one concerns the primary gear with variator driven<br>pulley.<br>Polini Motori has projected a further working on the case so that it is possible to fit the<br>supplementary gear that works on a pin to be screwed on the shaft itself. Thanks to<br>this, the pin is less flexible while usually it is completely overhanging .<br>Second important feature is the creation of air intakes on all the surface to improve<br>the variator cooling.<br>Thanks to these technical innovations it is possible to eliminate the vibrations<br>Minarelli&rsquo;s variator and it is possible to exploit the entire belt travel on the variator.<br>It is worked in Italy and it is recommended for race purposes.<br>Item: 170.0306</p>