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S&S Cycle 129" Power Pack for M8 Engines with 550 Gear Drive - Oil Cooled - Wrinkle Black Finish (Part No. 310-1227C)
Regular price $3,497.95 USD
129" Power Pack - 550 Gear Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - 107" M8 Upgrade your M8 engine...
Lease for as low as $/week
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129" Power Pack - 550 Gear Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - 107" M8
Upgrade your M8 engine with the S&S Cycle 129" Power Pack, designed for outstanding performance and reliable bolt-on installation. This kit increases your bike's displacement from 107 inches to 129 inches without requiring case modifications, making it an ideal choice for enthusiasts seeking a significant power boost with minimal downtime. The kit features 4.32-inch bore cylinders equipped with forged pistons and an 11.0:1 compression ratio, ensuring durability and high-performance output.
The included S&S oil pump and cam plate come with a stylish blue anodized finish and are engineered with independent scavenge sections for the flywheel cavity and cam chest, enhancing oil flow and cooling efficiency. Passage plugs are removable for servicing, and debris screens are integrated into both scavenge pickups to prevent contaminants from entering the oil system. A magnet in the cam chest further helps in debris prevention, contributing to engine longevity. An adjustable pressure relief valve allows fine-tuning of oil pressure while the unit is installed, ensuring optimal lubrication under various operating conditions.
This power pack includes Quickee pushrods and S&S premium tappets, along with hard-anodized, black-coated tappet cuffs made from billet aluminum for added durability. The S&S 550 cams are specifically designed for big bore applications and work seamlessly with valve springs supporting up to 0.605-inch lift, utilizing high-performance conical single-wire spring design to optimize valve control. All necessary gaskets, bearings, and hardware are included for an easy bolt-on installation. Built in the USA, this comprehensive kit offers a reliable upgrade path for serious riders looking to enhance their M8 engine's power and performance.
Whether you’re building a high-performance cruiser or a custom project, the S&S Cycle 129" Power Pack ensures quality, durability, and powerful results, making it a top choice for motorcycle enthusiasts and professional builders alike.
Features:
- Increases engine displacement from 107" to 129" with no case machining required
- 4.32-inch bore cylinders with forged pistons and 11.0:1 compression ratio
- S&S oil pump and cam plate with blue anodized finish for durability and style
- Independent scavenge sections for flywheel cavity and cam chest enhance oil flow
- Removable passage plugs for easy servicing and debris screens in scavenge pickups
- Magnet in cam chest helps prevent debris from entering the oil pump
- Enhanced oil flow capacity on both feed and scavenge sides for reliable lubrication
- Adjustable pressure relief valve allows fine-tuning of oil pressure
- Quickee pushrods and premium S&S tappets for reliable operation
- Hard-anodized, black-coated billet aluminum tappet cuffs for durability
- S&S 550 cams designed for big bore performance with valve springs supporting up to 0.605" lift
- High-performance conical single-wire valve springs for optimal valve control
- Includes all gaskets, bearings, and hardware for easy bolt-on installation
- Made in the USA for quality and reliability
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