Vespa 50-125/PV/ET3/PK/XL
VESPA
125 Primavera ET3 125 ccm 2T AC '76-'90 VMB1T

VESPA 125 Primavera ET3 125 ccm 2T AC '76-'90 VMB1T

Photo from VESPA 125 Primavera ET3 125 ccm 2T AC '76-'90 VMB1T | KLASSIK VESPA

Overview Vespa Primavera 125 ET3

The Primavera ET3, short for Elettronica 3 Travasi, was launched in 1976 as an extension of the Vespa 125 Primavera series. Its characteristic feature is a third transfer duct, which increases engine performance. In addition, an electronic Ignition was introduced to ensure reliability. Another striking feature is the new Exhaust, known as the "ET3 banana", which further enhances the design and performance of the vehicle. Among the 125cc models, this Vespa is the fastest.

Model history Vespa Primavera 125 ET3

The first model in this Vespa series was presented in a Jeans blue colour to match the Seat Cover, which was made from a jeans-like synthetic leather fabric. Similar to the Rally 200, light blue adhesive strips were attached to the rear right and left mudguard areas. The red Badge "Electronic" was emblazoned on the left rear side of the vehicle. Another feature of this Model was the revised Seat, which was both extended and designed for greater comfort. A practical bag hook was also attached to the front of the Seat. Until 1980, the model was equipped with a Speedometer with a scale up to 120 km/h. The design of the ET3 speedometer is also interesting, made entirely of plastic and without the traditional Chrome Ring.

The Engine of the Vespa Primavera 125 ET3

The ET3's Engine is a further development of the previous model, with some significant changes. One of the most striking innovations is the introduction of a third transfer port. The Ignition has been converted to an electronic system, which ensures improved engine performance. The compression ratio was raised from 8.2 in the previous model to 9.5. This adjustment required a change in the advance of the ignition timing from 25° to 20°. The Main Jet was also increased from 74 to 76. The newly introduced Silencer, a black matt Exhaust, is reminiscent of that of the 90 SS. These modifications made it possible to increase the power to over 7 hp at 6,000 rpm and reach a top speed of 98 km/h without increasing the revs.

Situation used market Vespa Primavera 125 ET3

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Another characteristic feature is the Ignition Lock, which is unusually located directly above the speedometer. This combination of features gives the Vespa Primavera 125 ET3 a unique character within the Vespa model range.

The colours of the Vespa Primavera 125 ET3:

Colour

Colour Name

Max Meyer Code

Colour info

blu-jeans-1-298-7228-2

Blue Jeans 228

1.298.7228

1976-1981

chiaro-di-luna-metallizzato-2-268-0108-2

Chiaro di Luna Metallizzato 108

2.268.0108

1978

blu-marina-1-298-7275-2

Blu Marina 275

1.298.7275

1978

alluminio-1-268-0983

Alluminio

1.268.0983

various Frame Parts

grigio-8012m

Grigio

8012M

Rust protection/primer

Sources

General Information

  • Producer VESPA
  • Model 125 Primavera ET3
  • Displacement 125 ccm
  • Cycles and cooling 2T / AC
  • Year of construction `76-`90
  • Type VMB1T
  • Chassis number (from/to) 1101 - 148923
  • Built quantity 144212
  • Dimension KLASSIK VESPA
  • Vehicle type Vespa 50-125/PV/ET3/PK/XL

Years of production & chassis numbers

  • Year of construction:

Technical data

  • Chassis type: self-supporting steel frame
  • Chassis number position: at the rear right at the height of the Lock Lever Side Panel Door, German models also have a Type Plate on the tunnel on the right
  • Length: 1660 mm
  • Width: 680 mm
  • Height: 1005 mm
  • Seat height: 780 mm
  • Wheelbase: 1180 mm
  • Ground clearance: 225 mm
  • Weight (empty): 78 kg
  • perm. total weight: 240 kg
  • Turning circle: 1650 mm
  • Performance (PS): 7 PS
  • Performance (kW): 5.2 kW
  • at rpm: 5500
  • Top speed: 90 km/h
  • Engine type: 2-stroke internal combustion engine
  • Engine manufacturer: PIAGGIO
  • Engine number: VMB1M
  • position of engine number: on the Crankcase below the shock absorber mounting
  • max. climbing ability: 25 %

Engine - cylinders, clutch & exhaust

  • Displacement: 121.17 ccm
  • Bore: 55 mm
  • Stroke: 51 mm
  • Number of cylinders: 1
  • Transfer ports: 2
  • Type of cooling: Air
  • Compression: 9,3:1
  • Starter: Kickstarter
  • Clutch: Multi-disc clutch in oil bath on Input Shaft
  • Clutch type: 3 Clutch Friction Plates, 1 centre spring
  • Stationary noise: 76 dB(a)
  • Driving noise: 79 dB(a)

Engine - Carburetor

  • Mixture preparation: Carburetor
  • Type of carburetor: Dell'Orto SHB 19.19
  • Main jet: 76
  • Idle jet: 45
  • Choke jet: 60

Engine - Transmission

  • Type of gearbox: Manual gearstick
  • Number of gears: 4
  • Gear rotation: 1st gear: 10:58 Z (5,80)
  • Gear rotation: 2nd gear: 14:54 Z (3,86)
  • Transmission: 3rd gear: 18:50 Z (2,78)
  • Transmission: 4th gear: 22:46 Z (2,09)
  • Gear rotation: Total: im 4. Gang: 5,31
  • Transmission: Primary: 24:61 Z (2,54)

Engine - Ignition

  • Ignition type: Electronic Ignition
  • Ignition timing: 20 °
  • Charging power (ignition): 50 W
  • Spark plug type: NGK B7HS / Bosch W5AC
  • Spark plug thread: short thread
  • Pre-ignition timing: 20

Chassis - tires and rims

  • Front tyre(s): 3.00x10
  • Front rim(s): 2.10x10
  • Rear tyre(s): 3.00x10
  • Rear rim(s): 2.10x10
  • Front tyre pressure: 1,8
  • Rear tyre pressure: 2,0 - 2,2

Chassis - Brakes

  • Brake system: Drum Brake
  • Front brake: Ø inside 125mm lining width: 18 mm
  • Front brake operation: mechanical with Cable
  • Rear brake: Ø inside 135 mm pad width: 20 mm

Chassis - steering column & swing arm

  • Front wheel guide: short swing arm with one arm
  • Rear wheel guide: Drive set swing arm
  • Front suspension: Shock Absorber L 200 mm, integrated Springs
  • Rear suspension: Shock Absorber L 340 mm, integrated Springs

Electronics

  • Alternator: 6 Volt - 50 Watt, swing light magneto ignition
  • Headlights: 6V 25/25W BA20d
  • Parking light: 6V 5W BA9s
  • Speedometer light: 6V 0.6W BA7s
  • Taillights: 6V 5W Festoon Bulb
  • Brake lights: 6V 10W Festoon Bulb
  • Indicator lights: 6v 18w (if available)
  • Horn: 6V AC

Operating materials

  • Fuel tank capacity: 5.6 l
  • Included reserve: 1 l
  • Mixing ratio: 1:50
  • Range (approx.): 265 km
  • Gearbox oil: SAE 30
  • Amount of gearbox oil: 0.25 l
  • Fuel consumption: 2.1 l/100km

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