1. はいきかん   engine   tricycle   gear lever   exhaust pipe   Hint Half-n-half Clue   2. くさり   chain   lock   tire pressure   gear lever   Half-n-half Clue   3. きかん   tricycle   gear lever   engine   seat   Half-n-half Clue   4. タイヤくうきあつ   tire pressure   sprocket   cable   horn   Half-n-half Clue   5. へんそくレバー   lock   tire pressure   seat   gear lever   Half-n-half Clue   6. ざせき   horn   chain   wheel   seat   Half-n-half Clue   7. けいてき   handbrake   lock   tricycle   horn   Half-n-half Clue