Complete Polini 70cc Evolution PRE engine prepared for drum brake

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Complete Polini P.R.E. engine 70cc
Code: 050.0948
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
* Where specifically indicated - See information on returns