Waver

Wavers are small vehicles created in Skypiea, made from a small boat and a Breath Dial, a set of handle bars are connected to the front wheel. Nami has one, the Shiro Mokuba I. They sound like motorbikes in the Anime.

Usage
Nami possesses a Waver that is faster than most, because its weight is very light and it uses a Jet Dial for propulsion instead of a Breath Dial. Wavers are extremely hard to control and it usually takes ten years to master the vehicle, the exception is when Nami had a natural ability to use it, due to her delicate touch.