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S&S Cycle 129" Power Pack for M8 - 550 Chain Drive, Oil Cooled, Wrinkle Black Finish with Highlight Fins (Part 310-1225C)
Regular price $3,294.95 USD
129" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - 107" M8 The S&S Cycle 129"...
Lease for as low as $/week
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129" Power Pack - 550 Chain Drive - Oil Cooled - Wrinkle Black w/Highlight Fins - 107" M8
The S&S Cycle 129" Power Pack (Part 310-1225C) is a comprehensive upgrade kit designed to significantly enhance the performance of your 107" M8 engine. This bolt-on kit increases engine displacement from 107 inches to 129 inches without the need for case machining, making installation straightforward for experienced mechanics and enthusiasts alike. The big-bore cylinders feature a 4.32-inch bore, paired with forged pistons and an 11.0:1 compression ratio, delivering increased power and efficiency.
The kit includes a high-performance S&S oil pump and cam plate with a striking blue anodized finish, along with removable passage plugs for easy servicing. Independent scavenge sections for the flywheel cavity and cam chest ensure optimal oil flow and debris management. Debris screens are integrated into both scavenge pickups, while a magnet in the cam chest helps prevent debris from entering the oil pump, contributing to engine longevity. The oil system is further enhanced with increased flow capacity on both feed and scavenge sides, ensuring proper lubrication under demanding conditions.
Adjustable pressure relief valve allows fine-tuning of oil pressure with the unit installed, providing flexibility for various riding styles and conditions. The kit also features Quickee pushrods, premium S&S tappets, and black-coated, hard-anodized tappet cuffs made from billet aluminum, offering durability and reduced maintenance. Designed to work with S&S 550 cams, which are optimized for big bore applications, the system supports cam lifts up to 0.605 inches and utilizes high-performance conical single wire valve springs compatible with these cams.
All necessary gaskets, bearings, and hardware are included for a bolt-on installation, making it a complete upgrade solution. Crafted in the USA, the S&S Cycle 129" Power Pack delivers reliable performance, enhanced power, and improved engine efficiency for your M8 motorcycle, making it an ideal choice for riders seeking a significant upgrade.
Features:
- Increases engine displacement from 107" to 129" with no case machining required
- Includes 4.32" bore cylinders and forged pistons with 11.0:1 compression ratio
- S&S oil pump and cam plate with blue anodized finish for durability and style
- Removable passage plugs facilitate servicing and maintenance
- Independent scavenge sections for flywheel cavity and cam chest improve oil flow and debris removal
- Debris screens in both scavenge pickups prevent contaminants from entering the oil system
- Magnet in cam chest helps prevent debris entry into the oil pump
- Enhanced oil flow capacity on 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 improved valve operation
- Black anodized, hard-coated tappet cuffs made of billet aluminum for durability
- Designed to work with S&S 550 cams supporting up to 0.605" lift
- Uses high-performance conical single wire valve springs for consistent valve operation
- Includes all gaskets, bearings, and hardware for a complete bolt-on installation
- Made in the USA for quality assurance and reliable performance
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