You can rent motorcycles (and bicycles) from several places in Na Thon, Chaweng and Lamai, as well as from various bungalows around the island. The going rate is 150B per day for a small motorcycle, but for longer periods try to negotiate a better rate. Take it easy on the bikes; every year several faràng die or are seriously injured in motorcycle accidents on Samui. A helmet law is enforced with occasional vigour.
Suzuki Caribbean jeeps can be hired for around 1500B per day from various travel agencies.