S&S Cycle 129" Big Bore Power Pack Kit for M8 VVT

Transform your Milwaukee-Eight engine with the S&S Cycle 129" Big Bore Power Pack, designed to unleash substantial performance gains. This comprehensive bolt-on kit dramatically increases your 107" M8 engine to a powerful 129" displacement, providing a significant boost in horsepower and torque without requiring any complicated case machining.

Description

Engineered for motorcycle enthusiasts seeking an unparalleled upgrade, the S&S Cycle 129" Big Bore Power Pack for M8 VVT models offers a complete solution for enhanced engine performance. This premium kit features an updated profile specifically designed to fit M8 models, including those with Variable Valve Timing (VVT). At its core, the kit boasts an S&S oil pump and cam plate, meticulously designed with independent scavenge sections for both the flywheel cavity and cam chest, ensuring optimal oil management. Enhanced oil flow capacity on both the feed and scavenge sides, coupled with an adjustable pressure relief valve (which can be serviced while installed), guarantees superior lubrication and cooling under demanding conditions. For ultimate protection, debris screens are integrated into both scavenge pickups, and a powerful magnet in the cam chest actively prevents harmful debris from entering the oil pump.

The S&S Cycle 129" Big Bore Power Pack also includes high-quality Quickee pushrods with pushrod tubes and S&S premium tappets, complemented by hard anodized, black-coated billet aluminum tappet cuffs for exceptional durability. Performance is further optimized with S&S valve springs, engineered with a high-performance conical single wire spring design, capable of accommodating cams up to 0.605" lift. A robust MLS (multi-layered steel) head gasket ensures a reliable seal, while the included 496 camshaft delivers a potent power curve. This kit retains stock engine height and works seamlessly with stock crankcases and both stock and S&S roller rocker arms, preserving original engine serial numbers. Proudly Made in the USA, this S&S VVT engine upgrade is compatible with both first and second-generation stock valve springs, offering a truly comprehensive and hassle-free performance enhancement.

Features & Highlights

• Dramatic Displacement Increase: Effortlessly upgrade your 107" Milwaukee-Eight engine to a powerful 129" displacement, delivering a significant boost in horsepower and torque with a simple bolt-on installation that requires no case machining.
• Optimized Oil System Reliability: Features an S&S oil pump/cam plate with independent scavenge sections for superior oil management, increased flow capacity, and an adjustable pressure relief valve. Integrated debris screens and a cam chest magnet provide critical protection against contamination.
• Premium S&S Internal Components: Equipped with high-performance Quickee pushrods, S&S premium tappets, and durable hard anodized billet aluminum tappet cuffs for long-lasting reliability and performance.
• Advanced Valve Train Performance: Includes S&S valve springs with a conical single wire design, supporting cams up to 0.605" lift, paired with a high-performance 496 camshaft and an MLS (multi-layered steel) head gasket for robust sealing and power delivery.
• Seamless Compatibility & Quality: Designed to fit M8 models, including VVT, while retaining stock engine height and working with stock crankcases and rocker arms. Original engine serial numbers are preserved, and the kit is proudly Made in the USA, ensuring exceptional quality.

Technical Specifications

• Engine Displacement Increase: 107" M8 to 129"
• Camshaft Profile: 496
• Valve Spring Lift Compatibility: Up to 0.605"
• Head Gasket Type: MLS (Multi-Layered Steel)
• Tappet Cuff Construction: Hard Anodized, Black Coated Billet Aluminum
• Origin: Made in the USA
• EAN: 09040227