Polini Motori increases its range of products dedicated to the scooters equipped with Minarelli engines (CY, MY, CW models) –
Polini For Race Ø 12 Crankshafts for Yamaha Minarelli aim to improve and increase its resistance, the quantity and the performance, the connecting rod machined from a block can be used with 12mm special pistons as an alternative to the original 10mm original piston pin.
They are equipped with the connecting rod to be installed with the new improved piston pins.
They have been perfectly balanced to reduce vibrations and power loss and they are thermically treated to increase their resistance.
Polini For Race Ø 12 crankshafts are proper to be used with the cast iron 40cc/70cc cylinders kit up to 14hp.
Polini For Race Ø 12 Crankshafts for Yamaha Minarelli
Item 210.0048/12 Yamaha Horizontal
Item 210.0049/12 Yamaha vertical
Public price: euro 139,00 + VAT
Polini Motori also presents the new range of kits and racing kits for Minarelli engines mod. CY, MY, CW with Ø 12mm piston pin. This feature lets an increase in terms of liability of a part that its under long stress.
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. The racing version has been designed to achieve racing performance and to work in line both with the Polini Original and Scooter Team mufflers.
The piston is mad of special alloy with high siliceous percentage with the aim to grant the maximum resistance to high temperatures.
The piston rings made of spheroidal cast iron, highly resistant to wear, rebored and lapped.
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 ratio with high turbulence.
Polini cylinders kits for Yamaha Minarelli engines must be installed together with the crankshafts with connecting rods for Ø 12 piston pins.
Polini cylinder kits for Yamaha Minarelli engines Ø 12:
166.0074/12
166.0076/12
166.0083/12
166.0074/12R
166.0076/12R
166.0083/12R
Public price starting from euro 150,00 + VAT