Polini Big Evo 70cc Cylinder Kit - Piaggio LC

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Excl. Tax: £197.03 Incl. Tax: £236.44
Polini Big Evo 70cc Cylinder Kit - Piaggio LC
CODE: PO140.0207
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Product Description
Polini Big Evo 70cc Cylinder Kit - Piaggio LC

Full Specification
Polini Big Evo 70cc Cylinder Kit - Piaggio LC

The new Polini BIG EVOLUTION cylinder kits for scooters equipped with Minarelli and
Piaggio engines are available is three different sizes:
-One with bore: 47,6mm - stroke:39,3mm - displacement: 70cc
-One with bore: 52mm - stroke:39,3mm - displacement: 84cc
-One with bore: 52mm - stroke:44mm - displacement: 94cc
The aluminium cylinder, with closed-deck cooling system, features a specific working,
which increases the thermal stability of the cylinder, cutting the risk of barrel
distortion even at the highest temperature. The cylinder liner has a nickel -chrome
coating. The head plane is brand new and innovative compared to the ones already
present on the market: it features a nickel coating to avoid the detonation problems
and then worked on with known process in advanced productive CNC centres that
grind it with a centesimal calibration.
In this way the head plane is perfectly coupled to the cylinder improving the
combustion phase in the burning chamber and increasing the head and cylinder’s life
It has 5 transfer ports plus an exhaust port with central bridge to optimise the gas
The distribution diagram is brand new for its performance features.
The piston is gravity die-cast in light alloy at high silicon content with a chromed,
grinded, and lapped cast iron ring.
The head is gravity die-cast from a block and later thermal treated to harden the
material the same as for the cylinder: the mechanical resistance can be compared to a
head machined from a block.
Before assembling the cylinder it’s necessary to bore the cases both in the crankshaft
and in the cylinder housing.
It is necessary to replace the original crankshaft with the new Polini 85mm one
complete with coil.

Fitting this kit may require adjustment of the carburettor. It should only be fitted by someone with the mechanical ability and equipment to rebuild and set up the engine correctly

APRILIA: SR 50 R, FACTORY (Piaggio) LC - SR 50 R, FACTORY (Piaggio) LC EURO 4
DERBI: GP1 50 2001-2003
PIAGGIO: EXTREM LC - NRG MC3 H2O - NRG, NTT, MC2 - NTT - QUARTZ - ZIP 50 SP H2O dal 2001 - ZIP 50 SP H2O dal 1996 al 2000

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