Secondary Air System - VESPA LX 125 150 Euro 3 User Manual

Secondary air system (03_14)

In order to reduce polluting emissions, the vehicle is furnished with a catalytic con-
verter in the muffler.
To favour the catalytic process, an extra amount of oxygen is added via a secondary
air system (SAS).
This system allows more oxygen to be added to the unburned gases before they reach
the converter, thus improving the action of the catalytic converter.
The air enters the exhaust duct from the head, and is purified by a black filter.
03_14
The system is fitted with a control valve that disables operation while decelerating to
avoid unwanted noise.
To ensure the best functioning of the SAS system, every 12,000 km the scooter should
be taken to an Authorised Piaggio Service Centre to have the filter cleaned (Sched-
uled maintenance operations section).
The filter sponge should be cleaned with water and mild soap, then it should be dried
with a cloth and slight blows of compressed air.
CAUTION
CONTACT AN AUTHORISED PIAGGIO SERVICE CENTRE TO CARRY OUT
THESE OPERATIONS.
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