S&S Cycle Oil Pump — Water Cooled — 2017-Up M8

S&S's billet oil pump for water-cooled (Twin-Cooled) Milwaukee-Eights: more flow on both sides of the system, independent scavenging for the flywheel cavity and cam chest, and debris screens protecting the rotors.

FITMENT

Fits 2017-up Harley-Davidson M8 models with water-cooled (Twin-Cooled) engines, excluding VVT models. In our catalog: 2017-up M8 Touring models with Twin-Cooled heads.

Not sure it fits your bike? Email info@norcalbaggersupply.com — email is the fastest way to reach us — and we'll confirm before you order. You can also call 916-626-9030 (Mon–Fri, 9 AM–5 PM PT).

SPECIFICATIONS

• Manufacturer: S&S Cycle — part number 310-0947A
• Oil pump only — water-cooled M8
• Precision machined from billet aluminum
• Independent scavenge sections for flywheel cavity and cam chest
• Debris screens in both scavenge pickups; magnet in the cam chest helps prevent debris from entering the pump
• Increased flow capacity on both the feed and scavenge side vs. stock (S&S)
• Pressure relief valve can be adjusted with the unit in the engine
• Made in the USA

INSTALLATION

Oil pump replacement is internal engine work done with the cam chest open. Follow the S&S instruction sheet included in the box and your Harley-Davidson service manual — note S&S's spec that pinion shaft runout cannot exceed .005 in. to run the S&S cam plate and oil pump. S&S publishes an official cam chest install video covering the oil pump — it is embedded below. Professional installation is recommended; email us for an install-partner referral.

QUESTIONS RIDERS ASK

Is this the pump only, or the pump and plate kit?
Pump only. If you want the matched set, S&S sells the cam plate and oil pump together in its cam chest kits — or email us and we'll put the right combination together for your build.

Why upgrade the oil pump on an M8?
The S&S pump moves more oil on both the feed and scavenge sides than stock, scavenges the flywheel cavity and cam chest independently, and screens debris before it can damage the pump — cheap insurance on a stock motor and close to mandatory on a built one.