Complete Polini P.R.E. engine 100ccc

Code: 050.0950

Specific for Piaggio Zip SP, the complete Polini engine was developed with MotoGP solutions. An uncompromising choice, Polini makes its know-how available thanks to the experience gained on the main racing circuits. The technical innovations are numerous:

• The crankcase is made of light alloy, rigidity and resistance to torsion are guaranteed by mounting on two bearings, with 2 exhaust systems available, one suitable for the 70cc engine and the other for 100cc
• The bearing seats are oversized to allow the housing of motor shafts of larger diameters.
• The reed valve has a larger seat for use with carburetors from 19 to 28 mm.
• The cylinders are in water-cooled light alloy with a 47.6 and 50 bore, both derived from the Polini 125 GP engine, the piston is gravity cast in light alloy with a high silicon content. The installation of the electric water pump is mandatory
• The transmission group has more space thanks to the particular geometry of the crankcase. The drive belt is deliberately oversized to maximize traction
• The ignition housing is designed for both 70cc and 100cc displacement
• The Torsen WD system allows the use of 2 braking systems:
  • Classic brake drum with original wheel
  • The innovative system with brand new hub holder for wheel including 180mm disc and housing for Polini 2-piston 32mm brake caliper. All components are machined from solid, also available a front rim with 200 mm disc lighter and more performing than the original