Vespa LX Series User Manual

Possible Cause Operation
Injector
Revolution timing sensor
Air temperature
Engine temperature
Lambda probe
Poor performance at full throttle
POOR ENGINE PERFORMANCE AT FULL POWER/ ENGINE IRREGULAR PERFORM-
ANCE ON PICKUP
Possible Cause Operation
Presence of faults detected by the self diagnosis Pump relay
HV coil
Injector
Revolution timing sensor
Air temperature
Engine temperature
Lambda probe
Spark plug power supply Spark plug
Shielded cap
HV cable
HV coil
Intake system Air filter
Filter box (sealing)
Air cleaner joint (sealing)
Parameter reliability Throttle valve position signal
Engine temperature signal
Intake air temperature indicator
Ignition advance
Fuel system Fuel level in the tank
Fuel pressure
Fuel filter
Injector capacity
Engine knocking
PRESENCE OF KNOCKING (COMBUSTION SHOCKS)
Possible Cause
Operation
Presence of faults detected by the self diagnosis Pump relay
HV coil
Injector
Revolution timing sensor
Air temperature
Engine temperature
Lambda probe
Ignition efficiency Spark plug
Parameter reliability Throttle valve position signal
Engine temperature signal
Intake air temperature indicator
Ignition advance
Intake system sealing Air cleaner joint
Filter box
TPS reset successful TPS reset successful
Fuel system Fuel pressure
Fuel filter
Injector capacity
Fuel quality
Selection of the cylinder base gasket thickness Selection of the cylinder base gasket thickness
Injection Vespa LX 125 - 150 i.e.
INJEC - 156

Vespa LX Series Specifications

General

Displacement	124 cc
Cooling System	Air-cooled
Front Tire	110/70 - 11"
Rear Tire	120/70 - 10"
Seat Height	785 mm
Kerb Weight	114 kg
Wheelbase	1, 280 mm
Length	1, 770 mm
Width	705 mm
Height	1, 140 mm
Engine Type	Single-cylinder, 4-stroke
Fuel System	Carburetor
Max Torque	10.4 Nm @ 6, 000 rpm
Transmission	Automatic
Front Suspension	Single-sided trailing arm with hydraulic shock absorber
Rear Suspension	Hydraulic shock absorber
Front Brake	200mm disc brake
Rear Brake	110mm drum brake