VESPA GTS Super 125 i.e. Service Station Manual page 149

Vespa GTS Super 125 i.e.
Check during regular operation by placing the ap-
propriate tool between the pump and the injector.
With the battery voltage> 12 V check that the fuel
pressure is 2.5 BAR and that the input current is
1.4 to 1.8 A
With the battery voltage > 12 V, check the capacity of the pump flow rate by disconnecting from the
injector the pipe equipped with the pressure gauge of the appropriate tool. Make a graded burette
available with a flowrate of approximately 1 L. Rotate the pump using the active diagnosis of the palm
top computer. Using a pair of long flat needle-nose pliers, choke the fuel pipe making the pressure
stabilise at approx. 2.5 BAR. Check that, in fifteen seconds, the pump has a flowrate of around 110cc.
Specific tooling
020480Y Petrol pressure check kit
Fuel filter check
Disconnect the terminals from the electric pump
Remove the screw shown in the picture
Injection
INJEC - 149