POLIN CYLINDER D.47 AXE 12 FOR RACE 1125908

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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>New Polini cylinder kits for Yamaha Minarelli engines</strong><br>Polini Motori presents the new range of kits for Minarelli engines mod. CY, MY, CW with &Oslash; 12mm piston pin.<br>This feature lets an increase in terms of liability of a parts that its under long stress.<br>The cast iron cylinder with 6 transfers is machined with tools that grant high quality products, with sliding walls with controlled roughness for a better cylinder-piston sliding. The exhaust diagrams and the transfers have been designed to work in line both with the Polini Original and Scooter Team mufflers.<br>The piston is mad of special alloy with high siliceous percentage with the aim to grant the maximum resistance to high temperatures.<br>The piston rings made of spheroidal cast iron, highly resistant to wear, rebored and lapped.<br>The head is made of special aluminum light alloy with high coefficient of heat exchange. The combustion chamber has been completely redesigned for a high compression ratios with high turbulence.<br>Polini cylinders kits for Yamaha Minarelli engines must be installed together with the crankshafts with connecting rods for &Oslash; 12 piston pins.<br><strong>Polini cylinder kits for Yamaha Minarelli engines &Oslash; 12:</strong><br>166.0074/12<br>166.0076/12<br>166.0083/12<br>Crankshaft :<br>Item 210.0048/12 Yamaha Horizontal<br>Item 210.0049/10 Yamaha Vertical<br>100% Made in Italy</p>