Vespa ET4 125-150
VESPA
ET4 alt 150 ccm 4T AC '96-'99 ZAPM04000

VESPA ET4 old 150 ccm 4T AC '96-'99 ZAPM04000

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Overview Vespa ET4 old 150

The new generation of automatic Vespa, which we also like to call the Modern Vespa, began in 1996 with the Vespa ET series.

Model history Vespa ET4 old 150

The ET models are still very popular with their owners today. This is probably due not only to their shape and manoeuvrability, but also to their durability or simply the fact that you didn't have to adjust your helmet to the size of the Helmet Case. GTS riders know what we are talking about. These models utilised the engines already used in PIAGGIO and Gilera vehicles, which also enjoyed great popularity in the Vespa.

The Engine of the Vespa ET4 old 150

The following engines and displacements were used in the respective models and also gave them their names:

  • ET2: 50 cc two-stroke engine of the 1st generation with Carburettor

  • ET2 Iniezione: 50 cc two-stroke engine with Fuel Injection Module

  • ET4 125 "old": 125 cc four-stroke engine of the 1st generation with Gauge Glass on the Oil Pan

  • ET2 (2nd generation): 50 cc two-stroke engine (HY-PER2) Euro2 with Carburettor and Catalytic Converter

  • ET4 50: 50 cc four-stroke engine with constant-pressure carburettor

  • ET4 125 "Leader": 125 cc 2nd generation Leader four-stroke engine with constant-pressure carburettor

  • ET4 150 "Leader": 150 cc 2nd generation Leader four-stroke engine with constant-pressure carburettor

The favourite among the 50 cc models was clearly the carburettor version of the two-stroke engine. The simple design of the air-cooled Engine with its simultaneously effective CVT transmission ensured a low-maintenance and low-wear overall concept, which also laid the foundation for a long-lasting insert in numerous successor models. Even though the new and innovative technology of the fuel-injected model seemed very interesting and promising at the time, it was ultimately unable to establish itself, probably also for cost reasons, as the more complex design of the small two-stroke engine was undoubtedly more expensive for the manufacturer to produce. In many countries, the less powerful 50 cc four-stroke version was hardly able to assert itself against the much livelier two-stroke, which is why you rarely saw an ET4 50 cc on the roads in Germany, for example.
A distinction is made between M04 and M19, colloquially also known as "old" and "leader", for the large versions of the ET models. The early 125 cc PIAGGIO engines in the ET4 were reliable, but had various problems, such as high oil consumption or Elevation of noise in the valve train. The years of manufacture of the early version are limited to the period 1997 to 1999.
These defects were remedied with the next generation of 125/150 cc Leader engines. The ET4 also relied on the proven fan cooling system for these Engines, which was perfectly adequate. The first Euro2 standards were implemented from 2004. Although the 2nd generation of the ET4 was only introduced in 2000, it was already replaced by its successor, the Vespa LX, in 2006.

Situation used market Vespa ET4 old 150

Where do you look for this vehicle?

General Information

  • Producer VESPA
  • Model ET4 alt
  • Displacement 150 ccm
  • Cycles and cooling 4T / AC
  • Year of construction '96-'99
  • Type ZAPM04000
  • Dimension MODERN VESPA
  • Vehicle type Vespa ET4 125-150

Years of production & chassis numbers

  • Year of construction:

Technical data

  • Engine type: 4-stroke internal combustion engine

Engine - cylinders, clutch & exhaust

  • Displacement: 150 ccm
  • Type of cooling: Air

Electronics

  • Battery voltage: 12 V

Further technical details / features

  • Info:

    The Sage Vespa ET4 150cc type M04

    According to old lore, it was once said that PIAGGIO had installed a 150cc M04 Engine in a Vespa ET4 and sent it out into the world.

    These stories are reason enough for us to keep believing.

    But the fact is: this Model seems to be a myth, a Yeti, or even a unicorn. Many people report it, but it has never been seen in the wild and its parents deny its existence.

    In fact, we found no data or information on this version at all. Neither at PIAGGIO in the archives nor at suppliers or other platforms.

    Only the newer version with the LEADER engines can be found on the Internet.

    However, if anyone can provide us with proof of the existence of this version, we would be extremely grateful. Until then, we can only insert a "placeholder" here.

    update 2.11.2024 Nico g.

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