1. serrure   cable   sprocket   engine   lock   Hint Half-n-half Clue   2. chaîne   chain   tricycle   sprocket   pedal   Half-n-half Clue   3. guidon   helmet   chain   handlebar   sprocket   Half-n-half Clue   4. pignon   tire pressure   inner tube   exhaust pipe   sprocket   Half-n-half Clue   5. casque   spoke   gear lever   brake   helmet   Half-n-half Clue   6. pneu   scooter   tire   pump   chain   Half-n-half Clue   7. frein   horn   brake   scooter   cable   Half-n-half Clue