Wiseco R970 Forged Big Bore Piston Kit 73mm 12:1 Compression Ratio 970cc

The Wiseco R970 is a complete forged big bore piston kit engineered to increase displacement to 970cc with a 73.00mm bore and an aggressive 12:1 compression ratio. Designed as a performance upgrade, this kit delivers the strength and precision required for demanding street and track applications.

Key Features:

• Forged Aerospace-Grade Aluminum: Each piston is forged from high-silicon, low-expansion aerospace alloy, compressing the material's molecular structure to maximize density, grain-flow alignment, and resistance to impact and fatigue
• Dedicated Forgings: Application-specific forgings allow for an optimized strength-to-weight ratio, with a dome designed for improved flame travel and a detailed skirt profile for stability and smooth cylinder bore operation
• CNC Diamond-Turned Finish: Precision machining on computerized turning centers ensures a perfect finish with zero size variation, compatible with cast iron, chrome, Nikasil, and boron composite cylinder bore compositions
• Engineered Installed Clearance: Each piston is designed with the correct installed clearance to maximize power output, minimize wear, and deliver the best cylinder seal at running temperature
• Oversize Big Bore Upgrade: The 73.00mm bore size represents a 2.00mm oversize over stock, increasing total displacement to 970cc for a meaningful performance gain
• Made in the USA: Engineered, forged, and machined at Wiseco's manufacturing facility in Mentor, OH

Kit Includes:

• 4x forged pistons (73.00mm bore)
• Piston rings
• Wrist pins
• Circlips
• Head gasket

The Wiseco R970 is the go-to choice for riders seeking a reliable, high-performance big bore solution. Compared to cast pistons, Wiseco forgings are tougher and more durable, making them well-suited to the demands of high-compression, high-horsepower engine builds.