S&s Cycle 129" M8 Power Package Engine Kit

Unlock the full potential of your Harley-Davidson M8 engine with the S&S Cycle 129" Power Package Engine Performance Kit. This comprehensive kit transforms your stock 107" oil-cooled M8 into a potent 129" powerhouse, delivering a significant boost in horsepower and torque. Experience enhanced throttle response and exhilarating acceleration throughout the RPM range.

Description

This meticulously engineered kit is designed for seamless integration with your existing stock crankcase, eliminating the need for any case machining. The big bore cylinders are perfectly matched with a high-performance cam, cam plate, and oil pump, ensuring optimal performance and reliability. The independent scavenge sections for the flywheel cavity and cam chest, combined with a strategically placed magnet in the cam chest, effectively prevent debris from entering the oil pump, safeguarding your engine's longevity. High-performance conical single-wire S&S valve springs ensure consistent valve control at high RPM. The original engine serial numbers are retained, maintaining the authenticity of your motorcycle. S&S's attention to detail extends to the removable passage plugs for easy servicing and debris screens in both scavenge pickups for added protection. The included MLS (multi-layered steel) head gaskets provide a superior seal for increased performance. Paired with a performance-matched 550 cam, this S&S 129" Power Package kit delivers unparalleled performance and durability. Proudly made in the USA.

Features & highlights

• Transforms your 107" oil-cooled M8 engine into a high-performance 129" powerhouse.
• No case machining required for easy installation.
• Features a high-performance cam, cam plate, and oil pump matched to the big bore cylinders.
• Independent scavenge sections and a cam chest magnet prevent debris from entering the oil pump.
• High-performance conical single-wire S&S valve springs for superior valve control.
• Includes MLS (multi-layered steel) head gaskets for a superior seal.
• Performance-matched 550 cam for optimized power delivery.

Technical specifications

• Brand: S&S Cycle
• Product Name: Performance Kit
• Type: Engine
• Displacement: 129"
• Bore Size: 4.320"
• Stroke Length: 4.375"
• Cooling System: Oil Cooled
• Cam Drive Type: Gear
• Color/Finish: Black, Highlighted Fins
• Features: Black Pushrod Tubes

Important to know

Works with stock crankcase.

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