Cylinder kit POLINI EVO Reed Ø60 pin Ø15 Vespa ET3 125 2T (C.54)
Article information
Polini Motori has produced a new Evolution kit with a reed valve induction in the cylinder for the 125 Vespa Primavera ET3.
Thanks to its 152cc displacement it features high level of power in in every kind of driving and for any type of race.
The kit with Evolution reed valve induction in the cylinder is supplied with: cylinder, piston, head, reed valve, intake manifold and gaskets set.
The cylinder is cast in aluminium with bore d. 60x54mm.
The liner with Nickel-Siliceous coating improves the piston sliding, its resistance to wear and abrasion. The transfer ports are designed for racing. It has 6 transfers. The transfer has a central bridge for a better exhaust gas scavenging.
The head is cast from a block and some fins have been made under the head surface in order to improve the heat dissipation. The compression ratio has been designed to achieve the best performance.
The piston is cast in aluminium and it has two S10 chromed cast iron ring. After being worked the piston has been covered with special molybdenum-bisulphide coating that improves the piston sliding during the running in period.
The reed valve has 6 carbon flaps of 0,4 mm thickness and the geometry of the flow guide allows it to improve of the air-petrol mixtures incoming speed.
The intake manifold has been developed to be housed in its original space without any modification and to be matched with the d.34 Dell’orto VHSB Carburetor.
To be able to fit this cylinder kit, bore the crankshaft housing in the case. It is necessary to change the original crankshaft with a new Polini one, part no. 210.0070, with its connecting rod of 105mm and 54mm stroke. By fitting these parts you achieved a 152cc of displacement.
To achieve the best performance fit the Polini Evolution muffler, part no. 200.0416
Specifications
Part number Polini | : | 140.0227 |
Bore | : | Ø60mm |
Stroke | : | 54mm |
Engine displacement | : | 152cc |
Material | : | Aluminium |
Class | : | Race |
Including cilinder head | : | Yes |
Bore category | : | Tuning |
Piston pin | : | Ø15mm |
Cooling | : | Air cooled |
Fits
Cylinder kit POLINI EVO Reed Ø60 pin Ø15 Vespa ET3 125 2T (C.54) fits the following vehicles:Documentation
PI776.pdf
Additional products
Spare parts