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motorized two-wheeled vehicle (with a displacement of less than 50cc); scooter; moped
原付で通学するのは禁止だ。
Commuting to school by scooter is prohibited.
原付の免許を取りに行った。
I went to get a scooter license.
駅前に原付を停めている。
I park my scooter in front of the station.