Wiseco Pistons PK1171 Pro-Lite Forged Piston Kit Oversize - 2-Stroke 68mm 1.60mm

The Wiseco PK1171 is a 2-Stroke Pro-Lite Forged Piston Kit engineered for the Honda CR250R, featuring a 68.00mm bore (+1.60mm oversize over the 66.4mm standard bore). Designed for Nikasil-lined cylinders, this kit delivers a displacement of approximately 255cc and is built to restore or upgrade top-end performance for both trail and track riding.

Pro-Lite Series Features:

• Forged aluminum construction — made from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, improved heat transfer, and extended service life
• Dedicated forging design — optimized strength-to-weight ratio with extra lightening operations for enhanced throttle response
• CNC-machined finish — precision diamond-turned surface for consistent sizing and optimal cylinder fit
• Engineered, forged, and machined in the USA — manufactured at Wiseco's facility in Mentor, OH
• Nikasil bore compatible — designed specifically for Nikasil-lined cylinders

Specifications:

• Bore Size: 68.00mm (Actual)
• Standard Bore: 66.4mm
• Oversize: +1.60mm
• Stroke: 72.00mm
• Displacement: ~255cc
• Piston Part Number: 702M06800
• Ring Set Part Number: 2677CD

Kit Includes:

• Piston — #702M06800
• Ring Set — #2677CD
• Wrist Pin — #S508
• CirClips — #CW18
• Bearing — #B1003
• Gasket — #W5319

The Pro-Lite series is Wiseco's staple forged 2-stroke piston line, offering a proven balance of performance and reliability for all-purpose riding. Whether rebuilding after wear or overboring for increased displacement, the PK1171 provides a complete solution for a Honda CR250R top-end refresh.