Vespa LX 2012 User Manual

COMPONENT LAYOUT
Specification
Desc./Quantity
1 Instrument panel
2 Throttle body and electronic injection control unit (MIU)
3 Diagnostics socket connector
4 Fuel pump
5 Engine temperature sensor
6 Fuel injector
7 HV coil
8 Engine speed sensor
9 Lambda probe
10 Injection load relay
11 Battery
MIU injection system
This vehicle is fitted with an integrated injection and ignition system.
Injection is indirect in the manifold through an electro-injector.
The injection and ignition are timed on the four-stroke cycle by means of a tone wheel keyed on to the
crankshaft (24-2 teeth) and pick-up sensor.
Combustion and ignition are managed on the basis of engine revs and throttle valve opening. Further
corrections are made according to the following parameters:
- Engine temperature
- Intake air temperature
- Lambda probe
The system implements cold engine idle fuel/air mixture correction with a stepper motor on a by-pass
circuit of the throttle valve. The control unit manages the Stepper motor and the injector opening time,
thereby ensuring the idle steadiness and the proper combustion.
In all conditions of use, mixture preparation is managed by modifying the injector opening time.
Vespa LX - S 125 3V ie 150 3V ie (2012) Injection
INJEC - 175

Vespa LX 2012 Specifications

General

Engine Type	Single-cylinder, 4-stroke
Displacement	124 cc
Cooling System	Air-cooled
Fuel System	Carburetor
Transmission	Automatic CVT
Fuel Tank Capacity	8.6 liters
Seat Height	785 mm
Curb Weight	114 kg
Length	1, 770 mm
Width	705 mm
Height	1, 140 mm
Max Power	10.3 hp @ 7, 750 rpm
Front Suspension	Single arm with coil spring and hydraulic shock absorber
Front Brake	200 mm
Rear Suspension	Coil spring and hydraulic shock absorber
Rear Brake	110 mm drum