S&S Cycle 128" Big Bore Kit for 114" & 117" M8

Unleash the full potential of your Harley-Davidson Milwaukee-Eight engine with the S&S Cycle 128" big bore kit. Engineered to transform your 114" or 117" CVO model, this comprehensive performance package delivers a significant boost in displacement and power, taking your ride to an exhilarating 128".

Description

Experience a dramatic increase in horsepower and torque with the S&S Cycle 128" Power Package. This meticulously designed Milwaukee-Eight performance kit is a true bolt-in solution, meaning no complex and costly case machining is required for installation. At its core, the kit features robust forged pistons, precisely engineered with a 4.250" bore size and optimized for a 4.500" stroke length, ensuring exceptional durability and reliability under demanding conditions. With an impressive 11.1:1 compression ratio, this upgrade promises an aggressive powerband and enhanced throttle response across the RPM range. The kit also includes a high-performance S&S 550 camshaft, paired with upgraded valve springs, ensuring optimal valvetrain control and maximizing the engine's potential. Integrated components such as the S&S oil pump/cam plate, Quickee pushrods with chrome covers, tappets, and tappet cuffs work in harmony to deliver a cohesive and powerful engine upgrade, making it an ideal choice for riders seeking a significant Harley-Davidson 114" engine upgrade.

Features & Highlights

• Massive Displacement Increase: Elevate your 114" or 117" Milwaukee-Eight CVO engine to a potent 128" for unparalleled power and torque, transforming your ride's performance.
• Hassle-Free Installation: Designed as a true bolt-in big bore kit, eliminating the need for complex and costly case machining, saving you time and effort.
• Superior Durability: Features high-strength forged pistons, engineered to withstand extreme pressures and temperatures for long-lasting, reliable performance.
• Optimized Valvetrain: Includes S&S Quickee pushrods with stylish chrome covers, high-performance tappets, and robust tappet cuffs for improved valvetrain stability and efficiency.
• Aggressive Cam Profile: Comes complete with the S&S 550 camshaft and upgraded valve springs, delivering an aggressive powerband and enhanced throttle response for an exhilarating ride.
• Integrated Oil Management: Incorporates a premium S&S oil pump and cam plate assembly, ensuring optimal oil flow and lubrication for critical engine components, enhancing longevity.

Technical Specifications

• Model: Power Package
• Product Name: Performance Kit
• Units: Kit
• Bore Size: 4.250"
• Stroke Length: 4.500"
• Displacement: 128"
• Compression Ratio: 11.1:1
• Cooling System: Water Cooled
• Cam Drive Type: Gear
• Color/Finish: Black, Highlighted Fins
• Features: Quickee Pushrods w/Chrome Covers
• Vendor Part Number: 310-1102C

Important to Know

• Compatibility: Not compatible with 121" CVO models.
• Vehicle Type: Not suitable for any Harley-Davidson Trike models.
• Gaskets: Intake and rocker cover gaskets 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