Tuning cylinder by the Italian mastermind Max Quattrini for Vespa largeframe engines.
The Quattrini kits are amongst the highest performing cylinders for the PX 125/150.
As can be expected in this price class, the cylinder is nikasil-coated. Thanks to the 62 mm bore diameter, 57 mm of stroke are enough to achieve 172 cc. The M1X is supplied with the fuel-air mixture via a rotary valve. Six amply dimensioned transfer ports and one large exhaust port make up the basic layout of the cylinder.
Furthermore, the reinforced piston is equipped with two thin rings.
When used together with the right accessories, 24 hp and a wide speed band are possible.
Conclusion:Just click the portmap and enjoy!
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