Moroso Air/Oil Separator for S&S Teardrop Air Cleaners - Black - Harley Twin Cam
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 is engineered to keep your Twin Cam engine's intake system clean and performing optimally. This essential upgrade plumbs directly into your factory breather system, effectively filtering out crankcase vapors, oil mist, and moisture. By preventing these contaminants from re-entering your intake, it protects your engine from harmful buildup and keeps your bike free of oil residue.
Why riders pick this
- Keeps intake tract, valves, and pistons clean
- Prevents oil from venting onto your bike or the ground
- Two-piece body simplifies cleaning and service
- Reduces detonation and knock from intake contamination
- Designed for Twin Cam with S&S Teardrop air cleaner
When you're pushing a Twin Cam, the factory breather system can send oil mist and unburnt fuel back into your intake. Over time, this leads to carbon buildup on valves, fouled throttle bodies, and reduced engine efficiency. The Moroso Air/Oil Separator intercepts these contaminants, ensuring only clean air enters your combustion chambers.
Protect Your Engine's Performance
- Filters crankcase vapors, residual oil, and moisture from the breather system
- Prevents oil from venting onto your engine, exhaust, or the ground
- Reduces detonation and knock caused by a contaminated intake charge
- Two-piece body unscrews for straightforward cleaning and maintenance
A Cleaner Running V-Twin
Installing the Moroso Air/Oil Separator is a smart move for any rider looking to preserve their Twin Cam's performance and longevity. It's a closed-loop system, meaning all collected oil and moisture are contained within the canister, not vented to the atmosphere. This not only keeps your bike cleaner but also helps maintain consistent engine operation, especially when paired with an S&S Teardrop air cleaner setup.
Specifications
- Brand: Moroso
- Manufacturer Part #: 85720
- UPC: 84663857201
- Length: 9 in
- Width: 6 in
- Height: 5 in
- Weight: 2 lbs
Common questions
What's the benefit of an air/oil separator?
It prevents oil mist, fuel vapors, and moisture from the crankcase from re-entering your engine's intake. This keeps your throttle body, valves, and pistons cleaner, improving engine health and performance.
Does this require any special maintenance?
The two-piece canister design allows for easy disassembly and cleaning. The frequency of cleaning depends on your riding style and conditions, but it's a simple process to keep it functioning optimally.
Will this fit my Twin Cam with a different air cleaner?
This specific Moroso Air/Oil Separator is designed for Twin Cam engines equipped with an S&S Teardrop air cleaner. Please confirm your air cleaner type before ordering.
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 | 82-9505 |
| WEIGHT | 2.0 lb |
