Moroso Air/Oil Separator Polished - Twin Cam with Stock Air Cleaner - Harley-Davidson
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 in a polished finish is engineered specifically for Twin Cam Harley-Davidson engines running a stock air cleaner. This system effectively filters crankcase vapors, oil mist, and condensation before they have a chance to re-enter your intake.
Why riders pick this
- Filters crankcase contaminants for cleaner engine operation
- Polished finish for a custom look
- Easy-to-clean two-piece body
- Closed-loop design prevents oil from venting to atmosphere
- Reduces engine detonation and carbon buildup
Installing a Moroso Air/Oil Separator is a smart move for any Twin Cam owner looking to maintain engine health and performance. By capturing unwanted contaminants, this separator helps keep your air filter, throttle body, intake, pistons, and valves free of oil and carbon buildup. It maintains the factory breather system function while providing a cleaner, more efficient intake charge.
Clean Intake, Better Performance
- Filters crankcase vapors, unburnt fuel, residual oil, and moisture
- Two-piece body unscrews for straightforward cleaning and service
- Closed-loop design keeps oil contained, preventing messy leaks
- Reduces detonation and knock by ensuring a cleaner intake tract
- Proudly made in the U.S.A.
Protect Your Twin Cam Engine
Over time, oil and carbon buildup can rob your Twin Cam of power and lead to costly maintenance. This polished Moroso Air/Oil Separator is a proactive solution, ensuring that only clean air enters your engine. It's designed for a seamless fit with your stock air cleaner, making it an easy upgrade that delivers tangible benefits for your Harley-Davidson's longevity and performance.
Specifications
- Brand: Moroso
- Manufacturer Part #: 85713
- UPC: 84663857133
- Length: 9 in
- Width: 6 in
- Height: 5 in
- Weight: 2 lbs
Common questions
Will this fit my Twin Cam with a custom intake?
This system is designed specifically for stock air cleaner fitment on Twin Cam engines. Custom intakes may require adapter verification; we recommend contacting Moroso with your specific intake part number to confirm compatibility.
How often do I need to empty and clean the separator?
The frequency of cleaning depends on your riding style and conditions. We recommend checking the canister every oil change and emptying/cleaning it as needed to prevent overfilling.
What is the benefit of a closed-loop design?
A closed-loop design ensures that all collected oil and contaminants are contained within the separator, rather than being vented to the atmosphere. This keeps your bike cleaner and is environmentally responsible.
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 | 82-9500 |
| WEIGHT | 2.0 lb |
