Wiseco 40008M06900 Forged Piston Kit Bore CR Honda - 69mm 13.5 1 CBR600RR

The Wiseco 40008M06900 is a high-performance forged piston kit designed for the Honda CBR600RR. Featuring a 69.00mm bore (2.00mm oversize) and a 13.5:1 compression ratio, this kit is purpose-built for riders seeking elevated engine output and durability beyond OEM specifications.

Wiseco pistons are forged from aerospace-grade, high-silicon aluminum alloy, delivering superior tensile strength, reduced reciprocating weight, improved heat transfer, and extended service life compared to cast alternatives. Each piston features a dedicated application-specific forging that optimizes the strength-to-weight ratio for the CBR600RR's engine architecture.

Kit Includes:

• Forged high-silicon aluminum piston
• High-quality piston rings
• Wrist pin
• Circlips

Key Specifications:

• Bore Size: 69.00mm (2.00mm oversize)
• Compression Ratio: 13.5:1
• Material: Forged high-silicon aluminum alloy
• Engineered, forged, and machined in the USA (Mentor, OH)

Important Note: This is an oversize piston. Cylinder boring or sleeving is required to match the 69.00mm bore specification prior to installation.

Wiseco has built its reputation over decades of motorsport involvement — from Supercross and Motocross to MotoGP and Superbike — making this kit a trusted choice for performance street and track builds alike.