S&S Cycle M8 Big Bore Piston Kit - 4.250" Bore - +.010" - 920-0148

Upgrade your motorcycle's engine performance with the S&S Cycle 131 big bore piston kit, engineered for serious power enthusiasts. This comprehensive piston set provides all essential components for a robust engine rebuild or performance enhancement.

Description

Unleash the full potential of your V-twin engine with the S&S Cycle Big Bore Piston Kit, specifically designed to achieve a substantial 131 cubic inches of displacement. This high-performance engine upgrade features precision-machined pistons with a 4.250-inch bore and a dished head shape, optimized for specific engine configurations and intended for use with a 4.625-inch stroke length. Each motorcycle piston set includes premium pistons, piston rings, wristpins, and clips, providing a complete solution for a powerful and reliable engine rebuild. S&S Cycle's commitment to quality ensures these components deliver exceptional durability and performance, standing up to the demands of aggressive riding. While compression ratios are approximate and depend on cylinder length, this kit offers a significant boost in torque and horsepower, transforming your ride into a true powerhouse. Ideal for enthusiasts seeking a substantial increase in engine capacity and overall performance, this kit embodies S&S Cycle's legacy of innovation in motorcycle engine components.

Features & Highlights

• Achieve 131 Cubic Inches of Displacement: Transform your engine with a significant increase in capacity, delivering massive gains in horsepower and torque for an exhilarating ride.
• Precision 4.250-inch Bore Pistons: Expertly machined pistons ensure optimal fitment and performance, designed for use with a 4.625-inch stroke length for maximum power output.
• Complete Piston Kit for Easy Installation: Includes a full set of pistons, high-quality piston rings, durable wristpins, and secure clips, providing everything needed for a comprehensive engine upgrade.
• Optimized Dished Piston Head Design: Engineered for specific combustion chamber characteristics, contributing to efficient fuel burn and reliable power delivery.
• S&S Cycle Quality and Reliability: Manufactured to the highest standards, these components ensure long-lasting durability and consistent performance, reflecting S&S Cycle's reputation for excellence.
• High-Performance Engine Upgrade: Ideal for riders seeking a serious boost in engine size and power, perfect for custom builds or revitalizing an existing powerplant.

Technical Specifications

• Product Name: Piston Kit
• Style: Big Bore
• Bore Size: 4.250"
• Bore Oversize: +0.010"
• Stroke Length: 4.625"
• Displacement: 131 cu in
• Piston Head Shape: Dished
• Units: Kit
• Vendor Part Number: 920-0148

Important to Know

• Requires correct length cylinders as specified by S&S Cycle for accurate compression ratio.
• Professional installation is recommended.