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S&S Cycle 128-inch Power Package for M8 Engines - Chain Drive, Wrinkle Black Finish with Highlighted Fins (Part 310-1103B)
Regular price $3,265.95 USD
128" Power Package - Chain Drive - Wrinkle Black with Highlighted Fins - 114"/117" M8 Upgrade your Milwaukee-Eight engine with the S&S...
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128" Power Package - Chain Drive - Wrinkle Black with Highlighted Fins - 114"/117" M8
Upgrade your Milwaukee-Eight engine with the S&S Cycle 128-inch Power Package, designed for exceptional performance and durability. This comprehensive big bore kit is made in the USA and increases engine displacement from 114 or 117 inches to a commanding 128 inches without requiring case machining, thanks to its precise bolt-on design. Featuring 4-1/4 inch bore cylinders paired with 11:1 forged pistons, this kit provides significant power gains while maintaining reliability. The package includes an oil pump and cam plate with a stylish blue anodized finish, offering enhanced oil flow and improved scavenging capabilities. Removable passage plugs facilitate easy servicing, while independent scavenge sections for the flywheel cavity and camchest ensure efficient oil management. A debris screen in both scavenge pickups, along with a magnet in the camchest, helps prevent debris from entering the oil pump, extending component life and maintaining engine cleanliness. The kit's increased oil capacity on both feed and scavenging sides ensures optimal lubrication during high-performance operation. The adjustable pressure relief valve allows fine-tuning of oil pressure while the unit is installed, enhancing engine protection. Included are S&S Quikee chrome pushrods with durable pushrod tubes, and premium S&S tappets designed for high-lift, high-rpm performance. The black-coated tappet cuffs are billet aluminum, providing improved stability. The package features S&S 550 cams specifically engineered for big bore applications, paired with high-performance conical single-wire valve springs compatible with lift up to .605 inches. This power package is finished in a striking wrinkle black with highlighted fins, combining style with function to deliver a reliable boost in performance for your M8-powered motorcycle.
Features:
- Big bore bolt-on kit increases displacement from 114/117 inches to 128 inches with no case machining required
- Includes 4-1/4 inch bore cylinders with 11:1 forged pistons for enhanced power
- S&S oil pump and cam plate with blue anodized finish improve oil flow and durability
- Removable passage plugs allow easy servicing and maintenance
- Independent scavenge sections for flywheel cavity and camchest optimize oil scavenging
- Debris screens in both pickups and a magnet in the camchest help prevent debris entry and prolong oil pump life
- Increased oil capacity on feed and scavenge sides for superior lubrication during high-performance riding
- Adjustable pressure relief valve enables fine-tuning of oil pressure with the unit installed
- Quikee chrome pushrods with chrome pushrod tubes for reliable valve operation
- Premium S&S tappets designed for high-lift and high-rpm stability
- Black-coated, billet aluminum tappet cuffs improve tappet stability under high stress
- S&S 550 cams tailored for big bore applications deliver increased power and torque
- High-performance conical single-wire valve springs compatible with lifts up to .605 inches
- Finished in a striking wrinkle black with highlighted fins for a combination of style and performance
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