1. triciclo   exhaust pipe   gear lever   handlebar   tricycle   Hint Half-n-half Clue   2. casco   helmet   engine   handbrake   wheel   Half-n-half Clue   3. pompa   tire pressure   pump   horn   exhaust pipe   Half-n-half Clue   4. catena   scooter   chain   seat   handbrake   Half-n-half Clue   5. serratura   sprocket   tire   shock absorber   lock   Half-n-half Clue   6. valvola   tricycle   valve   handbrake   tire pressure   Half-n-half Clue   7. pressione delle gomme   tire pressure   gear lever   handbrake   chain   Half-n-half Clue