VESPA GTS Super 125 i.e. Service Station Manual page 138

Injection
Remove the injector connector.
Remove the three screws fixing the manifold to the
cylinder head and the clip fixing the throttle body
to the manifold.
Remove the MIU ECU connector.
Remove the clip fixing the throttle body to the air
cleaner bellows.
INJEC - 138
Vespa GTS Super 125 i.e.