S&S Cycle M8 Cylinder Kit - 4.25" Bore - 128ci - 910-0733A

Upgrade your motorcycle's performance with the S&S Cycle Big Bore 128ci Cylinder Kit. This high-performance bolt-on cylinder kit features an impressive 4.250" bore and is designed to deliver significant power gains, transforming your ride with enhanced displacement and compression.

Description

Unleash the full potential of your engine with the S&S Cycle Big Bore 128ci Cylinder Kit. Engineered for motorcycle enthusiasts seeking a substantial power boost, this premium cylinder kit boasts a massive 4.250" bore and a 4.500" stroke, resulting in an impressive 128 cubic inches of displacement. With an aggressive 11.0:1 compression ratio, you'll experience enhanced throttle response and formidable torque. The cylinders feature an updated profile designed for seamless integration, utilizing a stock 4.840" bolt pattern that ensures a straightforward, bolt-on installation process without requiring modifications to your existing stock crankcases. Crafted with precision in the USA, these S&S Cycle 128ci Big Bore Cylinder Kit components are built for durability and performance, finished in a striking Black Granite with highlighted fins for a custom look that stands out.

Features & Highlights

• Massive 4.250" Bore: Significantly increases engine displacement to 128 cubic inches for maximum horsepower and torque output.
• Optimized Compression Ratio: Achieves an 11.0:1 compression ratio, providing explosive power delivery and improved engine efficiency.
• Bolt-On Installation: Features an updated cylinder profile with a stock 4.840" bolt pattern for direct fitment and hassle-free upgrade.
• Broad Compatibility: Engineered to work seamlessly with your motorcycle's stock crankcases, simplifying the installation process.
• Premium USA Craftsmanship: Manufactured with precision in the USA, ensuring superior quality, reliability, and long-lasting performance.
• Distinctive Aesthetics: Finished in an attractive Black Granite with highlighted fins, adding a custom, high-performance look to your engine.

Technical Specifications

• Model: Big Bore
• Style: Bolt-On
• Units: Kit
• Product Name: Cylinder Kit
• Bore Size: 4.250"
• Stroke Length: 4.500"
• Displacement: 128 cubic inches
• Compression Ratio: 11.0:1
• Color/Finish: Highlighted Fins, Black Granite
• Vendor Part Number: 910-0733A