S&s Cycle 129" M8 Power Package

Unleash the full potential of your Harley-Davidson Milwaukee-Eight engine with the S&S Cycle 129" Power Package. This comprehensive kit transforms your stock 107" oil-cooled M8 into a potent 129" powerhouse, delivering significant gains in horsepower and torque.

Description

The S&S Cycle 129" Power Package is engineered for bolt-in performance, requiring no case machining for installation. The kit includes big bore cylinders, a matched cam, cam plate, and oil pump, ensuring optimal performance and reliability. Independent scavenge sections for the flywheel cavity and cam chest improve oil scavenging efficiency, while a magnet in the cam chest helps prevent debris from entering the oil pump, enhancing engine longevity. High-performance conical single-wire S&S valve springs provide superior valve control at high RPMs. This kit features removable passage plugs for easy servicing and debris screens in both scavenge pickups for added protection. The MLS (multi-layered steel) head gaskets ensure a reliable seal under high pressure. Paired with a performance-matched 550 cam, this kit delivers impressive power gains. Plus, you retain your original engine serial numbers, maintaining the integrity of your motorcycle. Experience the ultimate M8 upgrade with this high-quality, American-made power package.

Features & highlights

• Transforms your 107" oil-cooled M8 engine into a high-performance 129" powerhouse.
• Big bore cylinders, matched cam, cam plate, and oil pump provide optimized performance.
• Independent scavenge sections and a cam chest magnet enhance oil scavenging and protect the oil pump.
• High-performance conical single-wire S&S valve springs ensure optimal valve control.
• MLS (multi-layered steel) head gaskets provide a reliable seal under high pressure.
• Works with the stock crankcase for easy installation.
• Proudly made in the USA.

Technical specifications

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

Important to know

This kit works with the stock crankcase. Professional installation is highly recommended to ensure optimal performance and reliability.

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

Parts Denmark is a new webshop based in Denmark. We have a physical location you can visit (No showroom yet), and we have both email and phone support in our opening hours.

Our company info is:
Parts Denmark ApS
VAT: DK45974758
Dam Holme 11
3660 Stenløse, Denmark
hello@partsdenmark.com
+45 222 333 29

Best regards,
William Svendsen & Martin Høyer (Owners)