1. Motorcycle Intake & Fuel Systems Deals
  2. sku: 22314868948424633
  3. MOROSO MN/RJS2

MOROSO MN-RJS2 Air Cleaner Oil Separator Cams Nu MN/RJS2 Air/oil

fits model: Twin. year: 2006.

Rjs2 Moroso Mn/rjs2 Air/oil Separator For Twin Cams With Stock Air Cleaner 2006 Nu

( Brand: Moroso ), ( Manufacturer Part Number: MN/RJS2 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Fxdbi Street Bob ), ( 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/rjs2 Air/oil Separator Cams Stock Air Cleaner Nu fits TWIN 2006

The **Moroso MN/RJS2 Air/Oil Separator** is a meticulously engineered aftermarket component designed to enhance the performance and longevity of the **Twin Cam air cleaner system** found on **2006 Honda NU (NX650) motorcycles**. This high-quality separator is specifically crafted to replace the stock unit, offering superior filtration and oil separation capabilities that help maintain optimal engine efficiency while reducing maintenance demands. Engineered with precision, the Moroso MN/RJS2 features a robust **aluminum housing** that ensures durability and resistance to corrosion, even under the demanding conditions of daily riding. Inside, a **high-efficiency paper filter element** captures fine dust, dirt, and debris, preventing contaminants from entering the engine and safeguarding critical components like the carburetors and intake system. The separator s **patented oil separation system** effectively removes oil mist from the air stream, minimizing carbon buildup on intake valves and pistons a common issue in air-cooled engines like the Twin Cam. This not only improves throttle response and power delivery but also extends the life of the engine by reducing wear caused by unburned oil. The MN/RJS2 is designed for a seamless fit, integrating flawlessly with the stock air cleaner housing and intake system, ensuring no modifications are required beyond the installation of the separator itself. Whether you're a performance enthusiast seeking enhanced airflow and reliability or a rider looking to reduce maintenance intervals, this Moroso separator delivers a balance of efficiency and practicality. Built to meet or exceed OEM standards, it stands as a reliable upgrade for those who demand more from their Honda NU s air filtration system.

### Pros and Cons of buying a Moroso MN/RJS2 Air/Oil Separator for a Twin Cam Air Cleaner on a 2006 Nu

#### **Pros:**

1. **Improved Engine Performance** The Moroso MN/RJS2 air/oil separator is designed to enhance airflow while maintaining proper lubrication for the carburetor or throttle body. This can lead to better throttle response, smoother operation, and improved power output, especially in high-performance applications.

2. **Reduced Oil Consumption** The separator effectively filters oil from the air intake, preventing excessive oil buildup in the carburetor or intake system. This helps maintain cleaner intake components and reduces the risk of oil-related issues like clogged jets or fouled spark plugs.

3. **Compatibility with Twin Cam Engines** The Moroso MN/RJS2 is specifically engineered to fit the 2006 Nu s Twin Cam air cleaner setup, ensuring a proper seal and reliable operation without modifications.

4. **Durability and Quality** Moroso is a well-regarded brand in the motorcycle aftermarket, known for producing high-quality, long-lasting components. The MN/RJS2 is made from sturdy materials designed to withstand the demands of daily riding.

5. **Easy Installation** The separator is designed for straightforward installation, requiring minimal tools and time. It typically replaces the stock air cleaner or fits into an existing system with minimal adjustments.

6. **Maintenance-Friendly** The separator is relatively easy to clean and maintain. Regular inspection and cleaning of the oil reservoir and filter elements help ensure optimal performance over time.

7. **Versatility** While primarily used with carbureted engines, the Moroso MN/RJS2 can also be integrated into some throttle body setups, offering flexibility depending on the rider s preferences or modifications.

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#### **Cons:**

1. **Cost** The Moroso MN/RJS2 is not a cheap component. Depending on where you purchase it, the price can range from $80 to $150 or more, which may be a significant investment for a bike that may not see heavy performance tuning.

2. **Maintenance Requirements** While easy to install, the separator requires periodic maintenance. The oil reservoir must be checked and topped up regularly, and the filter elements may need cleaning or replacement over time, adding to the long-term cost of ownership.

3. **Potential for Oil Leaks** If not installed or maintained properly, the separator can develop leaks around the gaskets or seals, leading to oil dripping onto the engine or frame. This can cause messy buildup and may require additional cleaning or adjustments.

4. **Limited Benefit for Stock Riders** If you primarily ride the bike at stock power levels with no aggressive throttle use, the benefits of the separator may be minimal. The performance gains are more noticeable in high-revving or modified setups.

5. **Compatibility with Aftermarket Mods** If you plan to further modify the bike (e.g., installing a throttle body, larger carburetor, or exhaust), you may need to ensure the separator remains compatible with these changes. Some aftermarket components might require additional adjustments or a different separator model.

6. **Learning Curve for New Riders** If you re unfamiliar with carbureted engines or air/oil separator systems, the initial setup and maintenance might feel overwhelming. Understanding how to properly oil the system and monitor oil levels is crucial for optimal performance.

7. **Weight Addition** The separator adds some weight to the air intake system, which may have a negligible impact on performance but could be a consideration for riders focused on minimizing weight.

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### **Conclusion:**

The Moroso MN/RJS2 air/oil separator is a worthwhile upgrade for riders who prioritize engine longevity, performance, and clean intake operation on their 2006 Nu with a Twin Cam setup. It offers clear benefits in terms of reduced oil consumption, improved airflow, and enhanced throttle response, particularly for those who push their bikes beyond stock specifications. However, it requires regular maintenance and comes at a higher upfront cost, which may not justify the investment for casual or stock-oriented riders.

For riders who frequently ride at high RPMs, modify their bikes, or notice excessive oil buildup in their carburetor, the Moroso MN/RJS2 is a strong recommendation. For those who mostly cruise at lower speeds or keep their bikes stock, the benefits may not outweigh the cost and effort required to maintain it.

### **Recommendation:**

If you are looking to optimize your 2006 Nu s Twin Cam air cleaner system and plan to ride aggressively or modify the bike, **purchasing the Moroso MN/RJS2 air/oil separator is highly recommended**. Ensure you follow the installation and maintenance guidelines carefully to maximize its effectiveness and longevity.

If you are a casual rider or prefer to keep the bike stock, you may not see enough benefit to justify the cost, and you could instead focus on simpler maintenance tasks like regular oil changes and carburetor cleaning.

Ultimately, the decision depends on your riding style, performance goals, and willingness to maintain the system properly.

Details:

Moroso Air/Oil Separator for Twin Cams with Stock Air Cleaner 2006 nu: Status: In.

part #: mnrjs2 price

  • $373.16

specifications intakefuelmotorcycle:

  • for models: Twin
  • for years: 2006
  • brand: Moroso
  • mpn: Mn/rjs2
  • compatible make: Harley Davidson
  • compatible model: Fxdbi Street Bob
  • 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

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general intakefuelmotorcycle:

  • condition: New
  • Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery

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  • # reviews: 17218
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offer intakefuelmotorcycle:

  • quantity: 1
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  • availability: In Stock
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  • started: February 7, 2026
for models: twin, for years: 2006, compatible make: harley davidson, compatible model: fxdbi street bob, 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,
category: motorcycle parts > motorcycle scooter parts accessories > air intake fuel delivery, sku: 22314868948424633,
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