Wiseco 40052M08300 Forged Piston Kawasaki Ultra LX STX 15-F STX 10.6:1 CR 83mm

The Wiseco 40052M08300 is a high-performance forged piston designed for Kawasaki Ultra LX and STX 15-F personal watercraft engines, featuring a 10.6:1 compression ratio and an 83mm bore diameter. Engineered for demanding marine environments, this piston delivers superior strength and durability over OEM cast alternatives.

Key Features:

• Forged High-Silicon Aluminum Construction — Wiseco pistons are forged from high-silicon, low-expansion aluminum alloy, providing superior tensile strength, reduced reciprocating weight, improved heat transfer, and extended service life compared to cast pistons.
• Diamond-Turned CNC Finish — Each piston is precision-finished on CNC turning centers, ensuring a perfect bore fit with zero size variation. Compatible with all modern cylinder bore compositions including cast iron, chrome, Nikasil, and boron composite.
• Oversize Availability — Available in oversize configurations to restore worn cast iron cylinders to factory tolerances. Chrome, Nikasil, and boron composite cylinders can be re-sleeved to accept Wiseco oversize pistons.
• 10.6:1 Compression Ratio — Performance-tuned compression ratio optimized for the Kawasaki Ultra LX and STX 15-F applications, balancing power output with reliability.
• 83mm Bore Diameter — Precisely machined to the correct bore specification for a proper drop-in fit during engine rebuild or performance upgrade.
• Manufactured in the USA — Produced at Wiseco's state-of-the-art computerized manufacturing facility, held to the strictest quality tolerances in the powersports industry.

Whether you're rebuilding a worn engine or upgrading for more performance on the water, the Wiseco 40052M08300 forged piston is the trusted choice for Kawasaki personal watercraft enthusiasts and professional technicians alike.