1. 車輪   chain   horn   tricycle   wheel   Hint Half-n-half Clue   2. 鎖   pedal   gear lever   lock   chain   Half-n-half Clue   3. 非常ブレーキ   seat   handbrake   lock   chain   Half-n-half Clue   4. 踏み板   pedal   sprocket   chain   exhaust pipe   Half-n-half Clue   5. 変速レバー   gear lever   helmet   pedal   exhaust pipe   Half-n-half Clue   6. 緩衝器   shock absorber   wheel   engine   seat   Half-n-half Clue   7. 鎖止め   sprocket   pedal   shock absorber   seat   Half-n-half Clue