Wiseco 743M06640 Pro-Lite Piston Kit 66.40mm Standard Bore 2-Stroke

The Wiseco 743M06640 Pro-Lite Piston Kit is a high-performance replacement piston designed for 2-stroke dirt bike engines with a standard bore of 66.40mm. This complete piston kit is forged from high-silicon, low-expansion aluminum alloy, delivering superior strength, reduced weight, and improved heat transfer for extended engine life and maximum performance.

Key Features:

• Pro-Lite piston design with CNC machined cam shape optimized for peak horsepower and service life
• Forged from aerospace-grade aluminum alloy using dedicated forgings for optimal strength-to-weight ratio
• Diamond-turned finish from CNC computer-controlled turning centers ensures perfect surface finish with zero size variation
• Horizontal slot-pin oiling reduces friction and provides superior scuff resistance
• Pressure seal groove design maximizes ring seal for improved compression and power
• Race-proven design used by top teams in Supercross, Motocross, and GNCC racing
• Precision forged and machined in the USA to exceed OEM standards

What's Included:

• Forged Pro-Lite piston
• High-performance piston ring set
• Circlips (wrist pin retainers)
• Note: Wrist pin not included with 2-stroke pistons unless specifically noted

This piston kit is compatible with multiple cylinder bore compositions including cast iron, chrome, Nikasil, and boron composite cylinders. Wiseco's 70+ years of racing experience and state-of-the-art manufacturing ensures you receive a piston that delivers consistent performance, reliability, and long service life. Only Wiseco replacement ring sets should be used on Wiseco pistons for optimal performance.