Launched in 1977 and sold in over two million units, the Vespa PX of 125, 150 and 200cc is the biggest sales success in the entire history of the Vespa company.

the PX. The squarish (55 x 52 mm) and lightweight piston design was aimed for high revs, as was the aluminum cylinder with Nikasil plating, the lightened flywheel, and the shorter 24mm carburetor ...