Wiseco 4171M07600 Forged Piston Kit Honda Bore CR - XR/XL250 76mm 10 1

The Wiseco 4171M07600 is a high-performance forged piston kit designed for Honda XR250 and XL250 motorcycles (1979–1983). This kit features a 76.00mm oversize bore (+2mm over stock) and a 10:1 compression ratio, making it an ideal upgrade for riders seeking improved power output and engine longevity. Wiseco piston number 2992XC.

Key Features:

• Forged from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, improved heat transfer, and longer service life
• Engineered, forged, and machined in the USA at Wiseco's facility in Mentor, OH
• Designed for each specific engine application and built to tight tolerances for optimum performance and strength
• Improved tensile strength of forged material optimizes durability and service life
• Dedicated forging design allows for an optimized strength-to-weight ratio
• Diamond-turned CNC finish guarantees a precise fit with no size variation
• Compatible with cast iron, chrome, Nikasil, and boron composite cylinder bore compositions
• Kit includes: piston, high-quality piston rings, wrist pin, and circlips

This is an oversize piston (+2mm) intended for use with a re-sleeved or re-bored cylinder. Wiseco's wide range of oversize options extends the life of cast iron-lined cylinders, and replacement sleeves are available for chrome, Nikasil, and boron composite cylinders.