1. Carburetors & Throttlebodies ATV For Sale
  2. sku: 17618814737193861
  3. MIKUNI 50L13CL561

MIKUNI 50L13CL561 Bsr Carburetor

fits model: 500, 600, Sportsman, Grizzly. make: Polaris, Yamaha. year: 1996–2012.

50l13cl561 Mikuni Genuine Bsr Carburetor Polaris Sportsman 500 Yamaha Grizzly 600 1996-2012

( Brand: Mikuni ), ( Manufacturer Part Number: 50L13CL561 ), ( Choke Type: Mechanical ), ( Type: Carburetor ), ( Machine Type: Atv, Utv / Sxs ), ( Country Of Origin: Japan )

Review MIKUNI Genuine Bsr Carburetor Polaris Yamaha fits SPORTSMAN GRIZZLY 500 600 1996–2012

The **Mikuni BS-R 50L13CL561** carburetor is a meticulously engineered, high-performance fuel delivery system designed to elevate the throttle response, power output, and overall drivability of your **Polaris Sportsman 500** and **Yamaha Grizzly 600** models produced between **1996 and 2012**. Built with precision and durability in mind, this **BS-R series** carburetor features a **50mm venturi throat**, optimized for smooth, linear power delivery across the entire RPM range, ensuring a seamless transition from low-end torque to high-revving performance. The **cloned Mikuni design** maintains the original engine s tuning integrity while incorporating modern advancements in fuel atomization and air-fuel mixture control, resulting in cleaner combustion, reduced fuel consumption, and enhanced engine longevity. Crafted from high-grade aluminum and stainless steel components, this carburetor is resistant to corrosion and wear, making it ideal for both off-road and on-road applications where reliability is paramount.

One of the standout features of the **BS-R 50L13CL561** is its **adjustable throttle stop and pilot jet system**, allowing for fine-tuning of idle smoothness, acceleration response, and overall power band. The **floating needle and seat assembly** ensures consistent fuel flow, preventing lean spikes that can lead to engine damage, while the **precision-machined throttle body** minimizes air restriction, maximizing airflow for better horsepower and torque. This carburetor is also equipped with a **durable rubber gasket kit**, ensuring a secure seal between the carburetor and intake manifold, reducing the risk of vacuum leaks that can disrupt engine performance. Whether you're hauling heavy loads, navigating rough terrain, or simply seeking a more responsive ride, the **Mikuni BS-R** delivers a noticeable improvement in performance without sacrificing the stock engine s reliability.

For enthusiasts who demand both performance and authenticity, the **BS-R 50L13CL561** is a direct replacement for the stock carburetor found on these models, ensuring an easy installation with minimal modifications required. Its **compatibility with modern fuel systems** means it works seamlessly with today s higher-octane fuels, reducing the risk of detonation and engine stress. Additionally, the **low-maintenance design** combined with Mikuni s reputation for quality makes this carburetor a long-term investment for those who prioritize both power and durability. Whether you're restoring a classic ATV or pushing the limits of your current machine, the **Mikuni BS-R 50L13CL561** carburetor stands as a proven upgrade that bridges the gap between stock reliability and high-performance capability.

### Pros and Cons of Buying a Mikuni 50L13CL561 BS-R Carburetor for Polaris Sportsman 500 / Yamaha Grizzly 600 (1996 2012)

#### **Pros:**

1. **Performance Enhancement** The Mikuni BS-R carburetor is designed to provide improved throttle response, better fuel atomization, and smoother power delivery compared to stock carburetors. This can result in noticeable acceleration and overall engine performance gains, especially in off-road applications where consistent power is critical.

2. **Durability and Reliability** Mikuni carburetors are known for their robust construction and long-lasting performance. The BS-R series is particularly well-regarded for its ability to handle high RPMs and rough terrain without excessive wear or failure, making it a reliable choice for ATVs and UTVs.

3. **Ease of Tuning and Adjustability** The BS-R carburetor features a modular design with easily adjustable components, including the pilot jet, main jet, and throttle stop screw. This allows for fine-tuning to match fuel types, altitude, or rider preferences without requiring extensive mechanical expertise.

4. **Compatibility with Aftermarket Upgrades** Since the Mikuni BS-R is a popular aftermarket carburetor, there is a wide availability of replacement parts, tuning kits, and performance accessories. This makes it easier to maintain or further modify the carburetor as needed.

5. **Better Fuel Efficiency (Under Certain Conditions)** When properly tuned, the BS-R carburetor can optimize fuel-air mixture, potentially improving fuel efficiency in some scenarios, particularly if the original carburetor was running rich or inefficiently.

6. **Reduced Carbon Buildup** The improved airflow and atomization can help minimize carbon deposits on intake valves and pistons, leading to cleaner combustion and longer engine life if maintained properly.

7. **Positive Community and Support** The Mikuni BS-R carburetor has a strong following among off-road enthusiasts, meaning there are abundant resources, forums, and experienced users who can offer guidance on installation, tuning, and troubleshooting.

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#### **Cons:**

1. **Higher Upfront Cost** The Mikuni BS-R carburetor is more expensive than many stock or generic aftermarket carburetors. The price can range significantly depending on whether it is new or used, and additional tuning components (jets, gaskets, etc.) may be required, adding to the total cost.

2. **Installation Complexity** While not overly difficult, installing a Mikuni BS-R carburetor may require some mechanical skill, especially if the original carburetor or intake system needs modification. Proper sealing, throttle cable adjustment, and fuel line routing are critical to avoid leaks or performance issues.

3. **Tuning Curve Learning Curve** Achieving optimal performance requires understanding how to adjust the jets and throttle stop screw. Incorrect tuning can lead to poor fuel economy, rough idling, or even engine damage (e.g., running too lean). Beginners may need to experiment or seek professional help to dial it in correctly.

4. **Potential for Fuel System Compatibility Issues** If the original fuel system (fuel pump, lines, or filter) is outdated or undersized, the BS-R carburetor may not perform as expected. Upgrading the fuel system (e.g., installing a high-flow fuel pump) may be necessary to support the carburetor s demands, adding to the cost.

5. **Maintenance Requirements** Like all carburetors, the BS-R requires regular cleaning and maintenance to prevent clogging or wear. Neglecting maintenance can lead to poor performance, fuel starvation, or failure, especially in dusty or dirty environments common to off-roading.

6. **Limited Stock Availability** While Mikuni carburetors are widely available, finding a specific model (like the 50L13CL561) in stock may require ordering from specialty suppliers, which can introduce delays.

7. **Potential for Overkill on Stock Engines** If the original engine is heavily modified or already running a high-performance setup, the BS-R carburetor may not offer significant benefits and could even cause issues if not properly matched to the engine s air/fuel requirements.

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### **Conclusion:**

The Mikuni 50L13CL561 BS-R carburetor is an excellent choice for upgrading the Polaris Sportsman 500 or Yamaha Grizzly 600 (1996 2012) if you prioritize performance, reliability, and adjustability. Its benefits in throttle response, durability, and tuning flexibility make it a favorite among off-road enthusiasts. However, the higher cost, installation complexity, and need for proper tuning should be carefully considered. If you are willing to invest time in learning the tuning process and maintaining the carburetor, the BS-R will likely deliver noticeable improvements in power and smoothness. For those on a tight budget or with minimal mechanical experience, a stock carburetor or a simpler aftermarket alternative might be more practical.

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### **Recommendation:** - **Buy the Mikuni BS-R if:**

- You are looking for a significant performance upgrade and can afford the initial cost.

- You are comfortable with basic mechanical work or are willing to learn how to tune the carburetor.

- You plan to use the vehicle frequently in demanding conditions where reliability and power are critical.

- You want a carburetor with a strong aftermarket support network and long-term durability.

- **Consider alternatives if:**

- You are on a tight budget and cannot justify the higher upfront cost.

- You lack experience with carburetor tuning and prefer a simpler, more forgiving setup.

- The original carburetor is still functioning adequately, and you do not need the extra performance.

- You are open to exploring fuel injection or other modern alternatives (though these are less common for older ATVs/UTVs).

For the best results, pair the BS-R carburetor with a clean fuel system, proper air filter maintenance, and a gradual tuning approach to avoid issues. If possible, consult with experienced riders or mechanics who have worked with this carburetor to ensure a smooth installation and setup.

Details:

Compatibility: Note: This is a highly versatile Mikuni platform configuration. Condition: New. Genuine Mikuni BSR Carburetor Polaris Sportsman 500 Yamaha Grizzly 600 1996 -2012, Original Japan constant velocity utility carburetor assembly. Series: BSR Constant Velocity CV.

Excellent zero-hour replacement option to restore original factory throttle response and reliability. Need it fast. Flawless, uninstalled condition. Brand: Mikuni.

Country of Manufacture: Japan. Includes the original yellow ink factory quality-control inspection stamps on casting, proving it has never seen fuel or field usage. Item comes ONLY with what is pictured, NO other materials available. Production / Calibration Stamping: 50L 13C L561.

The aluminum body features the authentic cast Mikuni logo alongside factory-engraved calibration codes 50L 13C and L561. Internal fuel circuits are completely dry and unvarnished. Butterfly linkages, manual choke brackets, and slide vacuum assemblies actuate with perfect factory spring retention. Year Range Make model Engine Size Notes, 1996 2012 Polaris Sportsman / Scrambler 500 500cc 4-Stroke Fits major mid-displacement utility lines, 1998 2001 Yamaha Grizzly 600 YFM600 600cc primary configurations, 2004 2006 Rhino 450 YXR450 450cc Side-by-Side 1998 2009 Arctic Cat 4x4 Automatic matching BSR assembly frames.

part #: 50l13cl561 price

  • $149.99

specifications carbthrotatv:

  • for models: 500, 600, Sportsman, Grizzly
  • for makes: Polaris, Yamaha
  • for years: 1996-2012
  • brand: Mikuni
  • mpn: 50l13cl561
  • choke type: Mechanical
  • type: Carburetor
  • machine type: Atv, Utv / Sxs
  • country of origin: Japan

shipping carbthrotatv:

  • type: Fixed
  • cost: $0.00
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  • class: Economy, Expedited, One-day
  • carrier: USPS, UPS

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  • policy: Returns Accepted
  • time: 30 Days
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general carbthrotatv:

  • ATV, Side-by-Side UTV Parts Accessories > Air Intake Fuel Delivery > Carburetors
  • condition: New

offer carbthrotatv:

  • quantity: 1
  • sold: 0
  • options: Ship-to-home
  • availability: In Stock
  • started: May 21, 2026

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  • # reviews: 17329
  • city: Athens, Georgia
  • rating: 99.4%

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for models: 500, 600, sportsman, grizzly, for makes: polaris, yamaha, for years: 1996-2012, choke type: mechanical, type: carburetor, machine type: atv, utv / sxs, country of origin: japan,
category: atv parts > atv, side-by-side utv parts accessories > air intake fuel delivery > carburetors, sku: 17618814737193861,
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1 offer $149.99 USD
  • New. Offer #1 priced at $149.99 + $0.00 shipping estimate = $149.99* total. Butterfly linkages, manual choke brackets, and slide vacuum assemblies actuate with perfect factory spring retention. Original Mikuni Japan constant velocity BSR utility carburetor assembly.FREE SHIPPING

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