Product Description

Get the performance you need with the S&S CYCLE POWER PK CHN M8 BLK OIL, available now at Knobtown Cycle. Kansas City’s trusted source for quality motorcycle parts.

Key Features

• Made in the USA
• Big Bore Kit
• Big-bore bolt-on kit increases 114″/117″ with 4-1/2″ stroke M-Eight to 128″ with no case machining required
• 4-1/4″ bore cylinders with 11:1 forged pistons
• Oil Pump/Cam Plate
• S&S oil pump/cam plate with blue anodized finish
• Passage plugs are removable for servicing
• Independent scavenge sections for flywheel cavity and camchest
• Debris screen in both scavenge pickups
• Magnet in camchest 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
• Pushrods
• Quikee pushrods with chrome pushrod tubes
• Tappets
• S&S premium tappets
• Tappet Cuffs
• S&S hard-anodized, black coated tappet cuffs are billet aluminum construction
• Improve tappet stability in high-lift, high-rpm situations
• Cam
• S&S 550 cams designed for big bore applications
• Valve Springs
• S&S valve springs work with cams up to .605″ lift
• High-performance conical single-wire spring design

Product Specifications

• Part Number: 09040086
• Brand: S&S CYCLE
• Weight: 54.20 lbs

Expert Installation Services

Order now and choose ship-to-store for complimentary installation. Kansas City motorcycle service experts!

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.