MOROSO MN-6YVV Air Cleaner Oil Separator Cams Uf MN/6YVV Air/oil
fits model: Twin. year: 2004–2007.
( Brand: Moroso ), ( Manufacturer Part Number: MN/6YVV ), ( Compatible Year: 2007 2006 2005 2004 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Flhrs Road King Custom ), ( Bundle Description: 1 Pc Genuine Moroso Air/oil Separ ), ( Type: Air/oil Separator For Twin Cams With Stock Air Cleaner ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )
Review MOROSO Mn/6yvv Air/oil Separator Cams Stock Air Cleaner Uf fits TWIN 2004–2007
The **Moroso MN/6YVV Air/Oil Separator** is a precision-engineered component designed exclusively for the high-performance demands of twin-cam engines in Harley-Davidson motorcycles from the 2004 through 2007 model years, specifically tailored for the UF series. This aftermarket upgrade stands as a critical link in the air intake system, ensuring optimal filtration and separation of oil vapors from the air-fuel mixture before it enters the engine. Crafted from high-quality materials, the MN/6YVV features a robust stainless steel construction that guarantees durability and resistance to corrosion, even under the harshest riding conditions. Its compact yet efficient design integrates seamlessly with the stock air cleaner setup, maintaining the integrity of the intake flow while significantly reducing oil carryover that can foul intake valves, spark plugs, and combustion chambers. The separator s internal baffles and labyrinthine pathways are meticulously calibrated to maximize airflow efficiency while effectively trapping microscopic oil particles, preventing them from entering the engine and prolonging critical components lifespan. Ideal for riders who prioritize both performance and longevity, this air/oil separator is a straightforward yet impactful modification that enhances engine reliability without compromising power delivery. Whether used in stock configurations or as part of a more extensive intake upgrade, the Moroso MN/6YVV ensures cleaner air intake, reduced maintenance headaches, and a smoother-running engine making it an indispensable accessory for any serious Harley-Davidson enthusiast.
The Moroso MN/6YVV Air/Oil Separator is designed to replace the stock air cleaner assembly on 2004 2007 Harley-Davidson Ultra Limited (UF) models equipped with Twin Cam engines. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.
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**Pros:**1. **Improved Airflow and Performance**
The Moroso separator is designed to provide better airflow compared to the stock unit, which can enhance throttle response and overall engine performance. The improved filtration system helps maintain cleaner air intake, reducing the risk of carbon buildup on intake valves and pistons.
2. **Durability and Quality**
Moroso is a well-known brand in the motorcycle aftermarket, known for producing high-quality, durable components. The MN/6YVV separator is made from sturdy materials and is built to withstand the demands of daily riding, including off-road use.
3. **Easy Installation**
The separator is designed to fit seamlessly with the stock air cleaner system, and Moroso provides clear installation instructions. Many riders report that the installation process is straightforward, especially for those with basic mechanical skills. The kit typically includes all necessary gaskets and hardware.
4. **Oil Separation Efficiency**
The separator effectively removes oil from the air intake, which helps prevent oil fouling of the intake system and engine components. This can extend the life of the air filter and reduce maintenance needs over time.
5. **Compatibility with Aftermarket Filters**
The Moroso separator is compatible with a variety of aftermarket air filters, such as K&N or MIG, allowing riders to customize their setup for better performance or increased airflow.
6. **Reduced Carbon Buildup**
By ensuring cleaner air intake, the separator helps minimize carbon deposits on intake valves and ports, which can improve engine efficiency and longevity.
7. **Positive Community Feedback**
Many riders in the Harley-Davidson community report positive experiences with the Moroso separator, praising its reliability and performance benefits. Online forums and reviews often highlight its effectiveness in reducing oil carryover and improving engine cleanliness.
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**Cons:**1. **Cost**
The Moroso MN/6YVV separator is not a cheap upgrade. Depending on where you purchase it, the price can range from $150 to $250 or more, which may be a significant investment for some riders. This cost is often offset by long-term benefits, but it can still be a deterrent for budget-conscious buyers.
2. **Potential for Oil Leaks**
While the separator is designed to reduce oil carryover, some riders report minor oil leaks around the gaskets or seals, especially if installation is not done correctly. Proper sealing and regular maintenance are essential to prevent leaks, which can lead to oil fouling of the intake system if left unchecked.
3. **Installation Complexity**
Although the installation is generally straightforward, some riders may find it challenging, particularly if they are not familiar with working on Harley-Davidson engines. Improper installation can lead to leaks or performance issues, so patience and attention to detail are required.
4. **Limited Customization**
While the separator is compatible with aftermarket filters, the unit itself is not highly customizable. Riders looking for extreme performance upgrades or highly tunable systems may need to explore other options, such as full intake systems or custom setups.
5. **Maintenance Requirements**
Like any air/oil separator, the Moroso unit requires regular maintenance, including checking oil levels and replacing the air filter as needed. Neglecting maintenance can lead to reduced efficiency and potential damage to the engine.
6. **Potential for Backpressure**
While the separator is designed to improve airflow, some riders report that it may introduce slight backpressure compared to a fully open intake system. This is generally minimal but could be a consideration for those seeking maximum airflow.
7. **Stock vs. Aftermarket Filter Trade-offs**
If you opt for an aftermarket filter with the Moroso separator, you may need to balance the benefits of increased airflow with the potential for reduced filtration efficiency. Some aftermarket filters are less restrictive but may not filter as effectively as stock filters.
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**Conclusion:**The Moroso MN/6YVV Air/Oil Separator is a solid upgrade for 2004 2007 Harley-Davidson Ultra Limited models with Twin Cam engines. It offers significant benefits in terms of airflow improvement, durability, and oil separation efficiency, which can lead to better engine performance and longevity. The installation is generally user-friendly, and the quality of the component is reliable. However, the cost, potential for minor leaks, and maintenance requirements are factors to consider.
For riders who prioritize cleaner air intake, reduced carbon buildup, and improved engine health, the Moroso separator is a worthwhile investment. It is particularly well-suited for those who ride frequently or in conditions where oil carryover is a concern. On the other hand, riders on a tight budget or those who prefer minimal modifications may opt for alternative solutions, such as upgrading only the air filter or sticking with the stock setup.
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**Recommendation:**If you are looking to enhance the performance and longevity of your 2004 2007 UF s engine, the Moroso MN/6YVV Air/Oil Separator is highly recommended. Pair it with a high-quality aftermarket filter, such as a K&N or MIG, to maximize airflow and filtration efficiency. Ensure that you follow the installation instructions carefully and perform regular maintenance to avoid leaks and ensure optimal performance.
For those who are unsure about the upgrade, consider starting with a simpler modification, such as replacing the stock air filter with an aftermarket option, to gauge your comfort level with modifications before investing in the separator. Ultimately, the Moroso separator is a practical and effective choice for riders who want to improve their bike s air intake system without undertaking major modifications.
Details:
Moroso Air/Oil Separator for Twin Cams with Stock Air Cleaner 2004 - 2007 uf: Status: In.
part #: mn6yvv price
- $373.16
specifications intakefuelmotorcycle:
- for models: Twin
- for years: 2004-2007
- brand: Moroso
- mpn: Mn/6yvv
- compatible year: 2007 2006 2005 2004
- compatible make: Harley Davidson
- compatible model: Flhrs Road King Custom
- bundle description: 1 Pc Genuine Moroso Air/oil Separ
- type: Air/oil Separator For Twin Cams With Stock Air Cleaner
- core charge: Free No Core Charge
- fitment type: Direct Replacement
payments intakefuelmotorcycle:
- other
- credit card: Discover
- wallet: Paypal
shipping intakefuelmotorcycle:
- transit: 3-5 Days
- class: Standard
- type: Fixed
- service: Standard
- cost: $0.00
returns intakefuelmotorcycle:
- policy: Returns Accepted
- time: 30 Days
- paid by: Seller
offer intakefuelmotorcycle:
- availability: In Stock
- options: Ship-to-home
- sold: 0
- started: February 7, 2026
- quantity: 1
general intakefuelmotorcycle:
- Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
- condition: New
seller intakefuelmotorcycle:
- # reviews: 17247
- rating: 98.7%
- city: Multiple warehouses
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