Wiseco 516M07550 2-Stroke Forged Piston Kit 75.50mm Bore 0.50mm Oversize PWC

The Wiseco 516M07550 is a forged 2-stroke piston kit designed for the Kawasaki JS550 and 550SX personal watercraft. Featuring a 75.50mm bore, this piston kit is part of Wiseco's 2-stroke forged series, engineered for a 537cc displacement engine with a standard bore of 75.00mm and an actual oversize bore of 75.50mm — a 0.50mm oversize over stock.

Engineered, forged, and machined in the USA in Mentor, OH, this piston is designed and built for each specific 2-stroke powersports engine.

Key Features:

• Aerospace-grade forged aluminum construction — the forging process compresses the material's molecules, increasing density and aligning grain flow for superior impact resistance, fatigue resistance, and improved strength and ductility.
• Pro-Lite CNC machined design — optimized cam shape and profile for peak horsepower and service life.
• Innovative forging design and piston skirt provide maximum horsepower and torque.
• Horizontal slot-pin oiling reduces friction and provides scuff resistance, along with a pressure seal groove for maximum ring seal.
• Improved tensile strength of forged material optimizes strength and service life with a dedicated forging and additional lightening operations for an optimized strength-to-weight ratio.
• Complete kit — includes piston, rings, wrist pin, and circlips.
• Oversize application — as an oversize piston, cylinder sleeving is required for installation.

Wiseco's legacy is rooted in 2-stroke piston manufacturing and performance, dating back to 1941. Today, Wiseco 2-stroke pistons are the result of decades of experience, incorporating the latest in 2-stroke piston manufacturing and design.