Across the road from the train station, to the left (as you are walking out of station) of the overpass, on the corner there is a rental place. Prices depend on the age of the bike, but you are looking at about $400nt a day for a 125cc scooter. They have 50-150cc scooters and a few motorbikes, too. We hired legends (野狼）from them before and they were in a pretty bad state, but they did have a couple of newish looking hartfords.
Tell them you are driving to kending or somewhere far and they will get you a better bike (sort of)
Show them any kind of driving licence and it’ll be fine.