Product Description

Upgrade your ride with the S&S CYCLE POWER PK CHN M8 BKG WTR from Knobtown Cycle, Kansas City’s premier motorcycle parts destination.

Key Features

• Big-bore bolt-on kit increases 114″/117″ with 4-1/2″ stroke M-Eight with no case machining required
• 4-1/4″ bore cylinders with 11:1 forged pistons
• S&S oil pump/cam plate with blue anodized finish
• Passage plugs are removable for servicing
• Independent scavenge sections for flywheel cavity and cam chest
• Debris screen in both scavenge pickups
• Magnet in cam chest to help prevent debris from entering the oil pump
• Increased oil flow capacity on both the oil feed and scavenge side
• Adjustable pressure relief valve can be adjusted with the unit installed in the engine
• Quickee pushrods with chrome pushrod tubes
• S&S premium tappets
• S&S hard-anodized, black coated tappet cuffs are billet aluminum construction
• Improve tappet stability in high-lift, high-rpm situations
• S&S 550 cams designed for big bore applications
• S&S valve springs work with cams up to .605″ lift
• High-performance conical single-wire spring design
• All necessary gaskets, bearings, and hardware for bolt-on installation is included
• Made in the U.S.A.

Product Specifications

• Part Number: 09040094
• Brand: S&S CYCLE
• Weight: 44.70 lbs

Professional Installation Available

Buy online with ship-to-store for free installation at our Kansas City shop, or visit our showroom today!

Notes: DISCONTINUED ITEM

Part Locations

Stock levels last updated: January 27, 2026 11:58 AM

Professional Installation Available

Knobtown Cycle offers professional installation services. Contact us via a service request to learn more.