1. pignon   chain   scooter   helmet   sprocket   Hint Half-n-half Clue   2. chambre à air   tricycle   motorcycle   handbrake   inner tube   Half-n-half Clue   3. câble   helmet   cable   motorcycle   sprocket   Half-n-half Clue   4. roue   wheel   spoke   tire pressure   pump   Half-n-half Clue   5. soupape   valve   handbrake   helmet   cable   Half-n-half Clue   6. serrure   tire pressure   pump   tire   lock   Half-n-half Clue   7. moteur   engine   shock absorber   seat   handbrake   Half-n-half Clue