S&S CYCLE 128" Power Pack - 4.500" Stroke - Water Cooled - Black Granite w/Highlights - M8 - Harley-Davidson '17-'25 - 310-1107C

Big Bore Kit:

• 114" to 128" Big Bore Kit for Stock Stroke Flywheel
• Black Granite Finish
• Highlighted Fins
• No case machining required
• 4.250" bore
• Forged Pistons
• 11.1:1 Compression Ratio

Oil Pump/Cam Plate:

• Precision Machined from Billet Aluminum
• Blue Anodized Finish
• Passage Plugs Removeable for servicing
• Independant Scavenge Sections for Flywheel Cavity and Cam Chest
• Debris Screens in both scavenge pickups
• Magnet in Cam Chest to help to stop debris from entering oil pump
• Increased Flow Capacity on both Feed and Scavenge side
• Adjustable Pressure Relief Valve is adjustable with unit installed in engine

Pushrods:

• Quickee Pushrods w/Chrome Pushrod Tubes

Tappets:

• S&S Precision Tappets

Tappet Cuffs:

• Hard Anodized Black Coating
• Billet Aluminum Construction
• Stronger than Stock Material eliminates Distortion
• Improve tappet stability in high lift and high rpm situations

Cam:

• S&S 550 Cam- Designed for Big Bore Applications
• Chain Drive

Valve Springs:

• Work well with cams up to .605 lift
• High Performance Conical Single Wire Spring
• Includes all gaskets, bearings, and hardware required for installation
• MADE IN USA

Not recommended for Tri-Glide or other three wheel models including conversion due to lugging nature of these bikes.

Notes: Not for 121" CVO models.

Specs