S&S Cycle 129" Big Bore Cylinder Kit

Start your engine upgrade with the S&S Cycle 129" Big Bore Cylinder Kit, engineered to boost your motorcycle's performance without compromising its original integrity. This premium kit delivers increased displacement and power, transforming your ride.

Description

The S&S Cycle 129" Big Bore Cylinder Kit is the ultimate solution for riders seeking a significant power increase. Designed for seamless integration, this high-performance motorcycle cylinder kit retains your engine's original serial numbers and stock height, ensuring hassle-free installation and compliance. Featuring a robust 4.320" bore size and a 4.375" stroke length, it elevates your engine's displacement to a formidable 129 cubic inches. The kit boasts an aggressive 11.0:1 compression ratio, providing a substantial boost in throttle response and overall horsepower. Crafted with precision, it includes Multi-Layered Steel (MLS) head gaskets for superior sealing and durability under extreme conditions. The cylinders come in a striking powder-coated, wrinkle black finish with highlighted fins, adding a custom, high-performance aesthetic to your motorcycle engine upgrade. Its stock bolt pattern and compatibility with your stock crankcase make this a straightforward yet powerful enhancement.

Features & Highlights

• Enhanced Displacement & Power: Transform your ride with a significant boost in engine displacement to 129", delivering noticeable power and torque gains for an exhilarating experience.
• Seamless Integration: Designed to work with your stock crankcase and bolt pattern, this kit retains your engine's original serial numbers and stock height, simplifying installation while maintaining authenticity.
• Superior Sealing with MLS Gaskets: Includes high-quality Multi-Layered Steel (MLS) head gaskets, providing exceptional sealing integrity and reliability under high-performance demands.
• Aggressive Compression Ratio: An 11.0:1 compression ratio optimizes combustion efficiency, resulting in improved throttle response and increased horsepower for a more dynamic ride.
• Durable & Stylish Finish: The cylinders feature a powder-coated, wrinkle black finish with highlighted fins, offering both robust protection and a custom, high-performance aesthetic.

Technical Specifications

• Product Name: Cylinder Kit
• Type: Big Bore
• Units: Kit
• Bore Size: 4.320"
• Stroke Length: 4.375"
• Displacement: 129"
• Compression Ratio: 11.0:1
• Color/Finish: Powder-Coated, Highlighted Fins, Wrinkle Black
• Vendor Part Number: 910-0843A
• MPN/SKU: 09311205

Important to Know

• Not compatible with VVT (Variable Valve Timing) models.