Wiseco PK1643 Pro-Lite Top End Piston Kit Bore - 2-Stroke 41.5mm

The Wiseco PK1643 is a Pro-Lite forged 2-stroke top end piston kit featuring a 41.5mm (803M) bore, designed as a complete one-kit solution for top end rebuilds. Built using Wiseco's aerospace-grade aluminum forging process, this kit delivers superior strength, durability, and performance over OEM replacement pistons.

Pro-Lite Forged Piston Technology:

• Forged aerospace-grade aluminum construction for maximum strength and impact resistance
• CNC-machined cam shape and profile for optimized horsepower and extended service life
• Computer-engineered piston skirt profiles minimize cylinder wall friction for reduced wear
• Lightweight forging design delivers instant throttle response and maximum torque
• Produced exclusively in the USA using Wiseco's proprietary forging process

Kit Includes:

• Pro-Lite forged piston (41.5mm / 803M bore)
• Piston rings
• Wrist pin
• Circlips
• Top end gasket set

Specifications:

• Bore Size: 41.5mm (803M)
• SKU / Part Number: PK1643 / 803M04150
• Engine Type: 2-Stroke
• Stroke Type: 2-Stroke

Wiseco Pro-Lite piston kits are engineered to meet or exceed OEM performance standards, making them the trusted choice for riders seeking a reliable, performance-grade top end rebuild. Manufactured in the USA with decades of motorsports expertise behind every component.