Wiseco PK1172 Pro-Lite Forged Piston Kit 68.5mm 2-Stroke Top End

The Wiseco PK1172 Pro-Lite Piston Kit is a complete top-end rebuild solution for the 1997–2001 Honda CR250R, featuring a forged 68.5mm (+2.10mm oversize) piston engineered to restore lost power and extend engine life in demanding 2-stroke applications. Wiseco's Pro-Lite line represents the gold standard for 2-stroke piston performance, combining decades of racing heritage with precision manufacturing.

Wiseco pistons are engineered, forged, and CNC machined in the USA at their Mentor, Ohio facility. The dedicated forging process produces a superior strength-to-weight ratio using aerospace-grade alloy, making the Pro-Lite equally at home on the trail or the race track. The 68.5mm bore size represents a 2.10mm oversize over the CR250R's standard 66.4mm bore — cylinder re-sleeving or re-plating is required before installation.

Kit Includes:

• 1 Forged Pro-Lite Piston — 68.5mm actual bore diameter (702M series)
• 1 High-Performance Ring Set — 2697CD, matched to 68.5mm bore
• 1 Wrist Pin — 18mm alloy pin for consistent, durable performance
• 2 Circlips (Round Wire Pin Locks) — CW18 18mm retention clips
• Top-End Gasket Set — complete gaskets for a full top-end rebuild

Key Specifications:

• Bore Size: 68.5mm (2.10mm oversize)
• Oversize Code: 702M06850
• Ring Set: 2697CD
• Wrist Pin Diameter: 18mm
• Stroke: 72.0mm
• Piston Series: Pro-Lite (2-Stroke)
• Cross-Reference: 702M06850, 2697CD

Wiseco's Pro-Lite forged 2-stroke pistons are race-proven and chosen by top race teams across all forms of competition. The optimized cam shape and CNC-machined profile deliver peak horsepower and extended service life. Pair with Wiseco rings exclusively to ensure proper fitment, seal integrity, and full performance.