Wiseco WK1047 Pro-Lite Forged Piston Kit Kawasaki PWC - 76mm JS550 550SX 2-Stroke

The Wiseco WK1047 is a Pro-Lite forged 2-stroke piston kit built for the Kawasaki JS550 and JS550 550SX personal watercraft. With a 76.00mm (2.992") bore, this kit delivers a reliable, high-performance solution for engine rebuilds on these popular stand-up jet ski models.

Wiseco Pro-Lite pistons are the result of decades of 2-stroke piston engineering, designed to offer an ideal balance of performance, reliability, and value. Each piston is forged from high-strength aerospace-grade aluminum alloy and CNC-machined in-house at Wiseco's facility in Mentor, Ohio — ensuring precise cam shape, optimal ring seal, and peak power output.

Kit Includes:

• 1 Pro-Lite forged aluminum piston
• High-performance piston ring set
• Alloy wrist pin
• Circlips

Key Features:

• 76.00mm bore — fits Kawasaki JS550 / JS550 550SX applications (SKU reference: 608M07600)
• Pro-Lite forged construction — dedicated forgings for superior strength-to-weight ratio using aerospace alloy
• CNC-machined for optimal cam profile, peak horsepower, and extended service life
• Designed for reed valve intake 2-stroke engines
• Compatible with cast iron, chrome, nikasil, and boron composite cylinder bores
• Engineered, forged, and machined in the USA

Wiseco's in-house forging and machining process allows full control over every stage of manufacturing — from raw bar to finished skirt coating — ensuring consistent quality and fit. The WK1047 is an ideal choice for both performance rebuilds and reliable restoration of the Kawasaki JS550 engine.

Note: Top-end bearings, gaskets, and cylinder sleeves are not included unless otherwise specified. This kit covers a single cylinder.