Vespa 150 Cosa

Vespa 150 Cosa
Manufacturer	Vespa
Production	1988 - 98
Engine	Two stroke, single cylinder
Compression ratio	9.2:1
Top Speed	95 km/h / 59 mph
Ignition	Electronic
Spark Plug	NGK BR7HS
Battery	12V AC
Transmission	4 Speed, grip-shift, constant mesh
Frame	Pressed sheet steel, streamlined monocoque structure
Brakes	Front: 150 mm drum Rear: 150 mm drum
Front Tire	3.0 x 10"
Rear Tire	3.0 x 10"
Weight	85 kg / 187 lbs (dry),
Fuel Capacity	7.7 L / 2 US gal
Manuals	Service Manual

It could reach a top speed of 95 km/h / 59 mph.

Engine

The engine was a Air cooled, centrifugal fan cooled Two stroke, single cylinder. The engine featured a 9.2:1 compression ratio.

Drive

Power was moderated via the Wet, multiplate.

Chassis

It came with a 3.0 x 10" front tire and a 3.0 x 10" rear tire. Stopping was achieved via 150 mm drum in the front and a 150 mm drum in the rear. The 150 Cosa was fitted with a 7.7 L / 2 US gal fuel tank. The bike weighed just 85 kg / 187 lbs.

Photos

Overview

The Vespa Cosa was initially to be called the Vespa R (standing for Rinnovata, meaning "revised"). It was unveiled at the Milan Motorcycle Show in 1987. The Cosa is a direct successor to the Vespa PX series, and although the internal workings are largely similar, it came with newly developed gearbox that was a significant improvement upon the gearbox that had previously been used in the PX series. The PX series was still in production at the time, however, and has continued production even after Cosa production was discontinued. Other improvements upon the PX series included storage space beneath the seat and anti-lock brakes on the front wheel. More controversially, it was also the first Vespa to utilise a significant amount of plastic parts in addition to the traditional monocoque pressed steel frame. The series is broadly divided into two generations. The first generation was built from 1988 to 1991, while the second generation (sometimes referred to as the Cosa FL) was in production from 1992 onwards. Both version are fundamentally the same, with some minor differences. Firstly, the clutch was modified so that it would be easier to pull in and release. Secondly, minor design alterations were made: the tail light was slightly different and moved to a new position, the seat lock was installed on the side of the saddle, and the saddle was widened for extra comfort.

Drawing by the designer Paolo Martin While the engine is virtually identical to that of the Vespa PX series of the time, there are three major differences in the design:

The swingarm pivot on the Cosa is wider than that of the PX. The rear spring strut on the engine housing is shaped differently. This is because the rear suspension of Cosa is longer than that of the PX. The mounting for the rear brake is different due to the hydraulic rear brake.

In addition, the carburetor on the Vespa Cosa came stock fitted with an electronic fuel valve and automatic choke. It also had a digital tachometer (similar to that on later versions of the Vespa T5).

Make Model	Vespa 150 Cosa and Cosa Elestart
Year	1988 - 98
Engine Type	Two stroke, single cylinder
Displacement	150 cc / 9.2 cub in
Bore X Stroke	57.8 x 57 mm
Compression	9.2:1
Carburetor	Dell'Orto SHBC 20/20L
Cooling System	Air cooled, centrifugal fan
Fuel Mixture	1:50
Ignition	Electronic
Starting	Kick start
Spark Plug	NGK BR7HS
Battery	12V AC
Clutch	Wet, multiplate
Max Power	6.25 kW / 8.5 hp @ 5700 rpm
Max Torque	12.75 Nm / 1.27 kgf-m / 9.4 lb-ft @ 4500 rpm
Transmission	4 Speed, grip-shift, constant mesh
Final Drive	Direct drive
Frame	Pressed sheet steel, streamlined monocoque structure
Front Brakes	150 mm drum
Rear Brakes	150 mm drum
Wheels	Interchangeable
Front Tire	3.0 x 10"
Rear Tire	3.0 x 10"
Dry Weight	85 kg / 187 lbs
Fuel Capacity	7.7 L / 2 US gal
Reserve	1.2 L / 0.3 US gal
Consumption Average	2.1 L/100 km / 48 km/l / 111 US mpg
Top Speed	95 km/h / 59 mph
Colours	Red, Blue, Black, Maroon, White, Silver
Sources	Vespaclub.co.uk

External Links

• http://www.vespaclub.co.uk