Wiseco 740M05625 Pro-Lite Forged Piston Kit Bore - 2-Stroke 56.25mm

The Wiseco 740M05625 Pro-Lite Piston Kit is a complete 2-stroke forged piston kit featuring a 56.25mm bore diameter and a 2.00mm oversize. Engineered, forged, and machined in the USA at Wiseco's facility in Mentor, OH, this kit delivers a proven combination of performance, reliability, and value for dirt bike and off-road riders.

Wiseco Pro-Lite forged 2-stroke pistons are the result of decades of experience in 2-stroke piston manufacturing, built for all-purpose riding from trail to track. Each piston is forged from high-silicon, low-expansion aluminum alloy, offering a superior strength-to-weight ratio compared to cast pistons. Dedicated forgings and extra lightening operations result in reduced reciprocating mass for instant throttle response.

Key Features:

• Forged aluminum construction — high-silicon alloy delivers maximum strength, reduced weight, and improved heat transfer
• CNC-machined skirt profile — computer-engineered cam shape minimizes cylinder wall friction for peak power and long service life
• Anti-detonation grooves — ring land diameter eliminates ring blow-by while maximizing combustion efficiency
• Horizontal slot-pin oiling — reduces friction and provides scuff resistance with a pressure seal groove for maximum ring seal
• Race-proven design — chosen by top race teams in Supercross, Motocross, and GNCC competition
• Complete kit — includes forged piston, high-performance rings, alloy wrist pin, and circlips
• 2.00mm oversize bore — requires cylinder sleeving or re-boring to 56.25mm
• Made in the USA

This Wiseco Pro-Lite kit provides everything needed for a proper top-end rebuild. The included rings, wrist pin, and circlips are manufactured by Wiseco to strict quality standards, ensuring correct fit and sustained performance. Note: This is a 2.00mm oversize piston — cylinder boring or re-sleeving to 56.25mm is required prior to installation.