Wiseco Pistons 4366M09800 Forged Piston Kit Compression - 98.00mm 11 1 XR600R

The Wiseco 4366M09800 is a high-performance forged piston kit designed for the Honda XR600R. Featuring a 98.00mm bore diameter (1.00mm oversize) and an 11:1 compression ratio, this kit is engineered to deliver maximum power and long-term durability for serious off-road and trail riding applications.

Key Features:

• Forged construction: Machined from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, and improved heat transfer compared to cast pistons
• Dedicated forging design: Purpose-built forging for the XR600R engine optimizes the strength-to-weight ratio for this specific application
• CNC diamond-turned finish: Precision machined on computer-controlled turning centers to guarantee exact sizing with zero variation, compatible with cast iron, chrome, Nikasil, and boron composite cylinder bore compositions
• 11:1 high compression ratio: Increases combustion efficiency for improved throttle response and top-end power
• 1.00mm oversize bore: Ideal for engines requiring a first overbore, restoring proper clearances in worn cylinders
• Engineered and manufactured in the USA: Designed, forged, and machined at Wiseco's facility in Mentor, Ohio

Kit Includes:

• One (1) forged piston
• Piston ring set
• Wrist pin (24mm)
• Circlip set

Specifications:

• Part Number: 4366M09800
• Bore Size: 98.00mm
• Oversize: 1.00mm
• Compression Ratio: 11:1
• Stroke: 80.00mm
• Displacement: 597cc

Wiseco is the only aftermarket piston manufacturer in the United States that exclusively uses the forging process, ensuring each piston delivers the strength and reliability demanded by high-performance powersports applications.