Fuel Supply - PIAGGIO XEVO 125 Euro 3 Service Station Manual

XEVO 125 Euro 3
the valve opens and the depression is suddenly
set to zero.
Lack of tightness or the fact that the valve opens
at different vacuum values should be regarded as
anomalies. In this case, replace it.
N.B.
LACK OF TIGHTNESS IN THE CUT-OFF VALVE
RESULTS IN EXHAUST NOISE (EXPLOSIONS
IN THE MUFFLER). INCORRECT CUT-OFF
VALVE CALIBRATION CAN RESULT IN CATA-
LYTIC CONVERTER MALFUNCTIONING
N.B.
A FAULTY CUT-OFF VALVE DIAPHRAGM, BE-
SIDES JEOPARDISING THE CORRECT OPER-
ATION OF THE CUT-OFF VALVE, ALSO DAM-
AGES IDLE FUNCTIONING
Specific tooling
020329Y MityVac vacuum-operated pump

Fuel supply

- To clean the filtering element proceed as follows: remove the cover and take out the paper filtering
element, clean with compressed air and refit.
- Make sure the filtering element is in the correct position.
- Check that the air passage sections are not damaged or deformed.
- Check the correct sealing of the coupling between the filter housing and the cover.
N.B.
FAILURE TO OBSERVE THESE INSTRUCTIONS MAY RESULT IN WRONG VACUUM INSIDE THE
FILTER HOUSING, WHICH IN TURN MAY PRODUCE VARIATIONS IN CARBURETION.
Removing the carburettor
Engine
ENG - 67