Gilera GP 800 i.e. Service Station Manual page 284

Injection
Connect the diagnostic tester.
Switch to «ON».
Select the functions of the diagnostic tester on
«TPS RESET».
Specific tooling
020460Y Scooter diagnosis and tester
Make sure that the throttle valve with the control is
supporting the stop screw.
Guaranteeing that this position will be kept, send
a confirmation for the TPS reset procedure.
INJEC - 30
GP 800 i.e.