Moroso Air/Oil Separator Universal Breather - Harley & Indian V-Twin
About Moroso
Moroso has manufactured racing components in Connecticut since 1968, supplying engine, chassis and shop products developed through motorsport.
Protect your V-twin's intake system and maintain peak performance with the Moroso Air/Oil Separator. This universal breather system effectively catches crankcase vapors, oil mist, and condensation before they can reach your air filter, throttle body, and intake valves. By preventing oil buildup, it helps maintain a cleaner burning engine and reduces the risk of detonation.
Why riders pick this
- Filters crankcase vapors and oil mist effectively
- Reduces carbon buildup and potential for detonation
- Two-piece design allows for easy cleaning and maintenance
- Closed-loop system prevents venting to the atmosphere
- Promotes a cleaner intake tract and engine longevity
- Universal fitment for Harley and Indian V-twin motorcycles
Stock breather systems often route oily crankcase vapors directly back into your intake, leading to carbon buildup on valves and a dirty air filter. The Moroso Air/Oil Separator provides a closed-loop solution, trapping these contaminants in a dedicated canister instead of venting them to the atmosphere or back into your engine. This results in a cleaner intake tract, promoting more efficient combustion and prolonging the life of critical engine components.
Cleaner Engine, Better Performance
- Filters crankcase vapors, unburnt fuel, residual oil, and moisture
- Reduces detonation and knock by maintaining a cleaner intake tract
- Two-piece body unscrews for easy cleaning and maintenance
- Closed-loop design prevents venting to the atmosphere
- Helps keep your air filter and throttle body free from oil residue
Essential Upgrade for Any V-Twin
Whether you're running a stock Harley or a heavily modified Indian, a clean intake system is fundamental to consistent performance. The Moroso Air/Oil Separator is an essential upgrade for any V-twin owner looking to optimize engine health and efficiency. Its straightforward design ensures easy installation and maintenance, providing a tangible benefit for your ride's longevity and performance. Keep your engine breathing clean, ride after ride.
Specifications
- Brand: Moroso
- Manufacturer Part #: 85710
- UPC: 84663857102
- Length: 9 in
- Width: 6 in
- Height: 5 in
- Weight: 2 lbs
Common questions
What is the primary benefit of this air/oil separator compared to a standard breather?
This separator catches and filters oil mist and vapors, preventing them from re-entering your intake system, which keeps your intake, valves, and air filter cleaner than a standard breather that vents directly into the intake.
How often does the canister need to be cleaned?
It's recommended to check the canister at regular service intervals. The two-piece design unscrews easily for emptying and cleaning, making maintenance simple.
Is this a universal fit for V-twin motorcycles?
Yes, this Moroso Air/Oil Separator is designed for universal fitment on V-twin motorcycles, including most Harley-Davidson and Indian Motorcycle models.
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 | 82-9509 |
| WEIGHT | 2.0 lb |
