Cylinder Polini Sport 70cc Minarelli vertical

Polini Sport cylinder for Minarelli vertical

Polini SPORT 70cc Minarelli vertical cylinder, high-performance cast iron sport cylinder from Polini.

Since it is made of cast iron and has a two-ring piston, it is ideally suited for intense everyday use, and is also known for its robustness and power, especially at mid to high rpm range. It can reach appr. 8hp when combined with the right set-up (17.5mm carburetor and sports exhaust).

Technical features:

• Cast Iron Cylinder, d = 47mm, with 5 transfer ports and oval exhaust port
• 2-ring piston, 10mm piston pin
• high-compression cylinder head, aluminium
• Gasket Set for mounting
• Carbon Fiber Reed Petals, 0.35mm, 2x

Hints and tips:

• Squish clearance is preset, a base gasket is included.
• Run in 300km (150km at ½ throttle and 150km at ¾ throttle).
• If you keep the oil pump, we recommend using Stage6 oil with excellent flow characteristics to prevent the pump from clogging.

Standard configuration :

• • Exhaust
  • Spark plug BR9HS
  • Small end  bearing
  • Carburetor 17,5mm
  • Sport CVT
  • V-belt

Configuration for maximum performance:

• • Exhaust
  • Small end bearing
  • Spark plug BR9HS
  • Offset woodruff key
  • 19mm carburetor
  • Reed valve
  • Air filter element
  • Sport CVT
  • Reinforced V-belt
  • Sport clutch