Polini 166.0074/12 Ø47mm Yamaha/minarelli Cylinder Kit

Polini 166.0074/12 Ø47mm Yamaha/minarelli Cylinder Kit Silver . Unleash your Yamaha/Minarelli engine´s potential with the new Polini 166.0074/12 Ø47mm Top End Cylinder Kit. Engineered for enhanced reliability and performance, this cast-iron cylinder boasts 6 ports and meticulously machined walls for superior piston-cylinder sliding. The redesigned cylinder head, crafted from a high-thermal-exchange aluminum alloy, features a high-compression combustion chamber with high turbulence for maximum power output. Paired with a high-silicon alloy piston and wear-resistant spheroidal cast iron rings, this kit ensures durability under extreme conditions. Designed to work seamlessly with both original and Polini Scooter Team exhausts. Requires a crankshaft with a Ø12mm piston pin. Compatible with various Aprilia Amico models. New Polini thermal groups for Yamaha Minarelli engines.Polini Motori presents the new range of kits for Minarelli model CY, MY, CW engines with a piston pin increased to Ø 12 mm. This increases the reliability of a part that is subjected to great stress.The cylinder is made of cast iron, with 6 ports. It is machined with special machines to achieve a high level of performance, with sliding walls of controlled roughness for greater cylinder-piston sliding. The diagrams and discharge transfers are specifically designed and manufactured to work in harmony with both the Original silencers and those of the Polini Scooter Team.The piston is made of a special alloy with a high percentage of silicon to guarantee maximum resistance to high temperatures.The high-strength spheroidal cast iron rings are wear-resistant, ground and lapped. The cylinder head is made of a special aluminum alloy with a high coefficient of thermal exchange. The combustion chamber has been completely redesigned for a high compression ratio with high turbulence.Polini thermal groups for Yamaha Minarelli engines must be combined with suitable crankshafts with a Ø 12 mm piston pin.Specifications- Composition: Aluminum- Diameter Ø (mm): 47Compatibility:- APRILIA AMICO 50 GLE :- APRILIA, AMICO 50 GLE, 50, 1995- APRILIA, AMICO 50 GLE, 50, 1994- APRILIA, AMICO 50 GLE, 50, 1993APRILIA AMICO 50 GL :- APRILIA, AMICO 50 GL, 50, 1997- APRILIA, AMICO 50 GL, 50, 1996- APRILIA, AMICO 50 GL, 50, 1995- APRILIA, AMICO 50 GL, 50, 1994- APRILIA, AMICO 50 GL, 50, 1993APRILIA AMICO 50 LX :- APRILIA, AMICO 50 LX, 50, 1993- APRILIA, AMICO 50 LX, 50, 1992APRILIA AMICO 50 SPORT :- APRILIA, AMICO 50 SPORT, 50, 1997- APRILIA, AMICO 50 SPORT, 50, 1996- APRILIA, AMICO 50 SPORT, 50, 1995- APRILIA, AMICO 50 SPORT, 50, 1994- APRILIA, AMICO 50 SPORT, 50, 1993- APRILIA, AMICO 50 SPORT, 50, 1992APRILIA AMICO 50 :- APRILIA, AMICO 50, 50, 2000- APRILIA, AMICO 50, 50, 1999- APRILIA, AMICO 50, 50, 1998- APRILIA, AMICO 50, 50, 1997. tradeinn Motardinn