InlandJet and HotRods performance Yamaha crankshafts for personal watercraft and Jet Boat.These performance Yamaha crankshafts are drop in ready.

A WaveRunner crankshaft is a mechanical component found in the engine of a Yamaha WaveRunner personal watercraft (PWC) that converts linear motion from the pistons into rotational motion. It consists of a series of rods, or crankpins, that are attached to the ends of the pistons and connect to a central shaft. As the pistons move up and down in the cylinders, the crankpins rotate the crankshaft, which in turn drives the output shaft and powers the WaveRunner.

WaveRunner crankshafts are typically made from high-strength materials such as steel or aluminum alloy, and are designed to handle the high levels of stress and wear that are common in marine environments. They are usually supported by a series of bearings that allow them to rotate smoothly, and may also be equipped with seals and other protective measures to prevent water and debris from entering the engine.

Like other types of crankshafts, WaveRunner crankshafts are an important part of the engine's powertrain and play a key role in the performance and efficiency of the personal watercraft. They are typically subjected to rigorous testing during the manufacturing process to ensure their strength and durability.