S&S Cycle 129" Power Package Engine Performance Kit for M8 - Gear Drive, Oil Cooled with Highlighted Fins (Part No. 310-1227)

S&S CYCLE

S&S Cycle 129" Power Package Engine Performance Kit for M8 - Gear Drive, Oil Cooled with Highlighted Fins (Part No. 310-1227)

Product type: Big Bore Kits

Vendor: S&S CYCLE

SKU : 0904-0114

Regular price $3,359.95 USD

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129" Power Package Engine Performance Kit - Gear Drive - Oil Cooled - Highlighted Fins - M8 Upgrade your Harley-Davidson M8 engine...

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129" Power Package Engine Performance Kit - Gear Drive - Oil Cooled - Highlighted Fins - M8

Upgrade your Harley-Davidson M8 engine with the S&S Cycle 129" Power Package Engine Performance Kit, part number 310-1227. Designed for seamless installation, this kit transforms your 107" oil-cooled M8 into a robust 129" powerhouse without requiring any case machining. The big bore cylinders come complete with matching cam, cam plate, and oil pump, ensuring optimal performance and compatibility. Crafted in the USA, this performance upgrade is built to enhance your motorcycle's power and reliability while maintaining the original engine serial numbers for easy identification and registration.
The kit features independent scavenge sections for the flywheel cavity and cam chest, along with a magnet in the cam chest to prevent debris from entering the oil pump, promoting engine longevity. High-performance conical single-wire S&S valve springs provide reliable valve operation under demanding conditions, while MLS (multi-layered steel) head gaskets ensure a durable seal. Passage plugs are removable for easier servicing, and debris screens are installed in both scavenge pickups to prevent contaminants from entering the oil system. The included performance-matched 550 cam delivers increased airflow and torque, working harmoniously with the stock crankcase for a straightforward upgrade that maximizes engine output.
With highlighted fin design for enhanced cooling and a gear drive system, this kit offers a combination of performance, durability, and style. Whether you're aiming for increased horsepower or improved torque, the S&S Cycle 129" Power Package is a reliable choice for serious riders seeking to elevate their motorcycle's performance without extensive modifications.

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