1. pedal   tire pressure   pedal   tricycle   inner tube   Hint Half-n-half Clue   2. motor   engine   pedal   tire   tricycle   Half-n-half Clue   3. casco   wheel   horn   helmet   cable   Half-n-half Clue   4. cámara de aire   pedal   engine   inner tube   valve   Half-n-half Clue   5. freno de mano   handbrake   spoke   exhaust pipe   handlebar   Half-n-half Clue   6. inflador, bomba   tricycle   pump   handbrake   sprocket   Half-n-half Clue   7. motoneta, escúter   sprocket   scooter   tire pressure   tricycle   Half-n-half Clue