Moroso Air/Oil Separator for Stock & SE Air Cleaners - Polished - Harley Milwaukee-Eight
About Moroso
Moroso has manufactured racing components in Connecticut since 1968, supplying engine, chassis and shop products developed through motorsport.
The Moroso Air/Oil Separator for Milwaukee-Eight engines is designed to maintain a clean and efficient intake system. It effectively filters crankcase vapors, oil mist, and condensation before these contaminants can re-enter the intake. This closed-loop system protects your engine from harmful deposits and ensures consistent performance.
Why riders pick this
- Filters crankcase vapors and moisture effectively
- Protects engine from carbon deposits and oil buildup
- Closed-loop system keeps oil off your bike and the ground
- Reduces engine detonation and knock
- Two-piece design for easy cleaning and service
Milwaukee-Eight engines, like all V-twins, benefit from a properly managed breather system. The factory setup can reintroduce oil and fuel vapors into your intake, leading to carbon buildup on valves, a dirty throttle body, and potential performance degradation. This Moroso separator ensures that only clean, filtered air makes it into your engine, promoting better combustion and longevity.
Maintain Peak Engine Health
- Filters crankcase vapors, fuel residue, and moisture from the breather system
- Protects against oil buildup and carbon deposits on internal engine components
- Closed-loop system keeps oil contained, preventing external venting
- Reduces detonation and knock from oil-contaminated intake charges
Engineered for M8 Performance
This polished Moroso Air/Oil Separator is a critical upgrade for any Milwaukee-Eight owner running a stock or Screamin' Eagle air cleaner. It's designed for easy installation and features a two-piece body that unscrews for quick and simple cleaning. By keeping your intake system spotless, you're investing in the long-term health and crisp performance of your V-twin.
Specifications
- Brand: Moroso
- Manufacturer Part #: 85722
- UPC: 84663857225
- Length: 9 in
- Width: 6 in
- Height: 5 in
- Weight: 2 lbs
Common questions
Why is an air/oil separator beneficial for my Milwaukee-Eight?
Factory breather systems can return oil and fuel vapors to the intake, causing carbon buildup and reduced efficiency. This separator filters those contaminants, ensuring a cleaner burning engine and better performance.
How often should I service this separator?
The frequency of service depends on your riding conditions and mileage. Periodically check the canister and empty it as needed. The two-piece design makes cleaning straightforward.
Is this compatible with all Milwaukee-Eight air cleaners?
This Moroso Air/Oil Separator is specifically designed to fit Milwaukee-Eight engines equipped with stock or Screamin' Eagle (SE) air cleaner setups. Please verify your air cleaner type for proper fitment.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Moroso |
| TYPE | Intake/Carb/Fuel System |
| SKU | 82-9506 |
| WEIGHT | 2.0 lb |
