S&S Cycle Big Bore Piston Kit for 128" Engines

Elevate your motorcycle's performance with the S&S Cycle Big Bore Piston Kit, engineered to deliver significant power and displacement gains. This comprehensive kit provides everything needed for a robust engine upgrade, ensuring enhanced durability and reliability for demanding riders.

Description

Unleash the full potential of your engine with this high-performance S&S Cycle 128 cubic inch big bore piston kit. Designed for motorcycle enthusiasts seeking a substantial power boost, this kit transforms your stock engine into a formidable powerhouse. Featuring a precise 4.250" bore size and a 4.500" stroke length, these pistons are crafted to optimize combustion and maximize torque across the RPM range. The kit includes a complete set of pistons, high-quality rings, durable wristpins, and secure clips, providing a full solution for your engine rebuild or upgrade. Each component is meticulously engineered to S&S Cycle's rigorous standards, ensuring a perfect fit and long-lasting performance. The dished piston head design is optimized for specific compression ratios, calculated with the correct length cylinders as specified by S&S, offering reliability even under extreme conditions. With a +0.010" bore oversize, this S&S Cycle big bore piston set is ideal for achieving a tighter tolerance and superior seal, crucial for maximizing engine efficiency and longevity. This kit is a testament to S&S Cycle's commitment to delivering top-tier motorcycle engine upgrades.

Features & Highlights

• Significant Displacement Increase: Achieve a powerful 128 cubic inch displacement, providing a noticeable boost in horsepower and torque for an exhilarating ride.
• Precision Big Bore Design: Engineered with a 4.250" bore size and a +0.010" oversize for optimal performance, enhanced cylinder sealing, and superior engine efficiency.
• Complete Engine Upgrade Kit: Includes all essential components – pistons, rings, wristpins, and clips – for a hassle-free and comprehensive engine rebuild or performance enhancement.
• Optimized Compression Profile: Features a dished piston head shape, meticulously designed to achieve specific compression ratios for reliable, high-performance operation.
• Durable S&S Cycle Quality: Manufactured by S&S Cycle, a trusted name in motorcycle performance, ensuring exceptional material strength and longevity under rigorous conditions.
• Enhanced Engine Longevity: Built with robust materials and precision engineering to withstand the demands of increased power, contributing to the overall durability of your motorcycle engine.

Technical Specifications

• Product Name: Piston Kit
• Style: Big Bore
• Units: Kit
• Bore Size: 4.250"
• Bore Oversize: +0.010"
• Displacement: 128"
• Stroke Length: 4.500"
• Piston Head Shape: Dished
• Vendor Part Number: 920-0142
• MPN/SKU: 09106522

Important to Know

• Compression ratios listed are approximate and are calculated using the correct length cylinders as specified by S&S.
• This kit includes pistons, rings, wristpins, and clips. Cylinders, gaskets, and other engine components are not included and must be purchased separately.

Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.

GLS home delivery costs DKK 59.

We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.

There is a 14-day return policy. Read more