Wiseco W5291 Top End Gasket Kit - 300cc Kawasaki Jet Ski

The Wiseco W5291 is a top end gasket kit engineered specifically for the 300cc Kawasaki Jet Ski, covering the JS300 (1986–1988) and 300 SX / JS300 SX (1987–1991) models. Designed and sourced in-house by Wiseco, this kit delivers the precise fit and superior sealing performance needed during a top end rebuild.

Kit Includes:

• Head gasket for a reliable combustion chamber seal
• Base gasket for a proper cylinder-to-crankcase seal
• Exhaust gasket for leak-free exhaust port sealing

Each component is manufactured from high-quality materials to meet or exceed OEM specifications, ensuring long-lasting durability in demanding watercraft applications. Note: This is a top end kit only and does not include bottom end components such as crankshaft seals or bearings.