Wiseco Pistons 40069M07800 Forged Piston Kit Compression - 4-Stroke 78mm 11.5 1

The Wiseco 40069M07800 is a complete forged 4-stroke piston kit designed for the Honda CBR250R and CRF250L, featuring a 78.00mm bore and an 11.5:1 compression ratio. Engineered, forged, and machined in the USA at Wiseco's facility in Mentor, Ohio, this kit is built to deliver a superior combination of performance and long-term reliability.

Wiseco is the only aftermarket piston manufacturer in the United States that produces pistons exclusively using the forging process, resulting in a stronger, more durable piston compared to cast alternatives. Each piston is crafted from high-silicon aluminum alloy using dedicated forgings that deliver an optimized strength-to-weight ratio with aerospace-grade alloy.

Key Features:

• Forged high-silicon aluminum alloy construction for maximum strength and durability
• 78.00mm bore with 11.5:1 compression ratio for improved power output
• ArmorGlide skirt coating reduces friction, quiets operation, and improves scuff resistance
• Horizontal slot-pin oiling reduces friction and provides scuff resistance with a pressure seal groove for maximum ring seal
• Race-ready dome finish with smooth edges for improved combustion chamber flow
• Dedicated forgings engineered specifically for this 4-stroke powersports engine application
• Improved tensile strength of forged material optimizes strength and service life

Kit Includes:

• Forged piston
• High-quality piston rings
• Wrist pin
• Circlips

This Wiseco piston kit is a direct fit for big bore or oversize rebuild applications. Note: Oversize pistons may require cylinder boring or sleeving to achieve the correct fitment.