Wiseco 521M05800 Pro-Lite Piston Kit Bore Oversize - 2-Stroke 58.00mm 2.00mm

The Wiseco 521M05800 Pro-Lite Piston Kit is a high-performance forged 2-stroke piston kit machined to a 58.00mm bore diameter at +2.00mm oversize over standard, with a 50.00mm stroke. This oversize piston is designed to restore performance in cast iron-lined cylinders that have been bored out, extending engine life and maintaining tight tolerances. Note: Power valve must be modified when using this oversize piston.

Key Features:

• Forged from high-silicon, low-expansion aluminum for superior strength, reduced weight, and improved heat transfer
• CNC machined for optimal cam shape and profile for peak power and long service life
• Race-ready dome finish with smooth edges for improved combustion flow
• Horizontal slot-pin oiling reduces friction and provides scuff resistance
• Pressure seal groove for maximum ring seal
• Tight tolerances for quiet, reliable running
• Built from race-proven designs trusted by top race teams across all forms of motorsport
• Engineered and forged in the USA at Wiseco's Mentor, OH facility

Kit Includes:

• Forged Pro-Lite piston
• Piston ring(s)
• Wrist pin
• Circlips

Specifications:

• Bore Diameter: 58.00mm
• Oversize: +2.00mm
• Stroke: 50.00mm
• Note: +2.00mm oversize — cylinder boring or re-sleeving required
• Note: Power valve must be modified

Only Wiseco replacement ring sets should be used on Wiseco pistons to ensure proper fit and maintained performance. Whether you're a trail rider or competitive racer, the Pro-Lite kit delivers the durability and performance that Wiseco has been known for since 1941.