Wiseco 40133M10050 Forged Piston Kit Bore CR - 4-Stroke 100.50mm 9.5 1

The Wiseco 40133M10050 is a 4-Stroke Forged Series Piston Kit featuring a 100.50mm bore (0.50mm oversize) and a 9.5:1 compression ratio, designed for the Kawasaki KLX650 and KLX650R. Engineered, forged, and machined in the USA at Wiseco's facility in Mentor, OH, this kit delivers the tight tolerances and high-performance reliability that Wiseco is known for.

Key Features:

• Forged high-silicon, low-expansion aluminum alloy construction for superior strength, reduced weight, and improved heat transfer
• Dedicated forging design optimizes strength-to-weight ratio for each specific engine application
• Computer-engineered piston skirt profiles stabilize the piston in the bore, minimizing cylinder wall friction while maximizing horsepower and torque
• Anti-detonation grooves on ring land diameters create turbulent combustion gas flow, sealing the compression ring and eliminating ring blow-by
• Diamond-turned CNC finish guarantees precise sizing with no variation
• Complete kit includes forged piston, rings, wrist pin, and circlips
• Compatible with nikasil, iron, and all modern cylinder bore compositions

Specifications:

• Bore Size: 100.50mm (0.50mm Oversize)
• Compression Ratio: 9.5:1
• Series: 4-Stroke Forged
• MPN: 40133M10050

Note: This is an oversize piston. Oversize pistons require cylinder boring or sleeving to the specified bore diameter prior to installation.