1. catena   tricycle   chain   lock   scooter   Hint Half-n-half Clue   2. pompa   valve   pump   tire   shock absorber   Half-n-half Clue   3. pedale   gear lever   pedal   brake   tire pressure   Half-n-half Clue   4. valvola   valve   tricycle   seat   wheel   Half-n-half Clue   5. motore   inner tube   engine   valve   seat   Half-n-half Clue   6. scappamento   seat   exhaust pipe   chain   cable   Half-n-half Clue   7. manubrio   pedal   motorcycle   handlebar   horn   Half-n-half Clue