Vespa PX: history, specs, pictures

From CycleChaos
Jump to navigation Jump to search

Vespa PX
Also called PX125, PX 125, PX150, PX 150
Production 1977 - 2017
Class Scooter
single cylinder, two-stroke
Bore / Stroke 57.8mm x 57.0mm
Top Speed 54 mph (87 km/h)
Horsepower 8.72 HP (6.5 KW) @ 6600RPM
Torque 7.08 ft/lbs (9.6 Nm) @ 6000RPM
Fuel System carburetor
Ignition cdi
Transmission Gear box: 4-speed

Final Drive: belt

Clutch: wet, centrifugal clutch, cable operated
Suspension Front: single sided trailing link with hydraulic shock absorber
Rear: hydraulic monoshock
Brakes Front: single disc. stainless steel disc
Rear: expanding brake (drum brake)
Front Tire 3.50-10
Rear Tire 3.50-10
Wheelbase 49.61 inches (1260 mm)
Length 71.26 inches (1810 mm)
Width 29.13 inches (740 mm)
Seat Height 31.89 inches (810 mm)
Weight 213.85 pounds (97.0 Kg) (dry), 106.0 kg (wet)
Fuel Capacity 2.11 Gallon (8.00 Liters)
Manuals Service Manual

The Vespa PX150 was a single cylinder, two-stroke scooter produced by Vespa between 1977 and 2017. It could reach a top speed of 54 mph (87 km/h). Max torque was 7.08 ft/lbs (9.6 Nm) @ 6000 RPM. Claimed horsepower was 8.72 HP (6.5 KW) @ 6600 RPM.


The engine was a air cooled single cylinder, two-stroke. A 57.8mm bore x 57.0mm stroke result in a displacement of just 150.0 cubic centimeters. Fuel was supplied via a single overhead cams (sohc).


The bike has a 4-speed transmission. Power was moderated via the wet, centrifugal clutch, cable operated.


It came with a 3.50-10 front tire and a 3.50-10 rear tire. Stopping was achieved via single disc. stainless steel disc in the front and a expanding brake (drum brake) in the rear. The front suspension was a single sided trailing link with hydraulic shock absorber while the rear was equipped with a hydraulic monoshock. The PX150 was fitted with a 2.11 Gallon (8.00 Liters) fuel tank. The bike weighed just 213.85 pounds (97.0 Kg). The wheelbase was 49.61 inches (1260 mm) long.

1977 Vespa PX[edit]

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.

1998 - 2007 Vespa PX125[edit]

A two-stroke engine is a rare thing for any bike or scooter over 50cc today, so the 123cc two-stroke powering the PX125 is a welcome change of pace. It needs to be revved to get the best from it - trying to accelerate in too high a gear results in the motor bogging down. But keep the motor spinning and the PX will whisk happily along on a cloud of blue smoke.

2008 - 2013 Vespa PX125[edit]

2008 - 2013 Vespa PX125 2008 - 2013 Vespa PX125

The Vespa PX125 has essentially remained unchanged since its introduction in 1977, but it doesn't feel 35 years old. Subtle changes to keep the Vespa up to date and to get it through Euro 3 emissions regulations mean it feels similar to a modern scooter, only with a two-stroke, manual engine. It doesn't handle like a sportsbike - but a Vespa is all about looking cool, not going fast. Remember that and it can be great fun.