BFO 1UFC8L Carburetor Big

( Brand: Bfo ), ( Manufacturer Part Number: 1UFC8L ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Choke Type: Mechanical ), ( Compatible Make: For Yamaha ), ( Compatible Year: 2001-2009 ), ( Country Of Origin: China ), ( Engine Type: 4-stroke ), ( Fit 2: For Yamaha Grizzly 350 2007-2011 ), ( Fit 3: For Yamaha Kodiak 400 Yfm400 2000-2006 ), ( Fit 4: For Yamaha Big Bear 400 2004-2006 Bruin 350 ), ( Fit 5: For Yamaha Grizzly 450 2007-2012 ), ( Fit 6: For Yamaha Wolverine 450 2007-2010 ), ( Fit For: For Yamaha Wolverine 350 2006-2009 ), ( Fitment Type: Direct Replacement ), ( Inner Diameter: Intake Side ), ( Items Included: Gasket, Mounting Hardware ), ( Machine Type: Atv, Utv / Sxs ), ( Manufacturer Warranty: 2 Years ), ( Material: Alloy, Aluminum ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Oe/oem Part Number: 1p0-e4101-01-00, 1p0-e4101-10-00, 3d5-e4101-10-00, 5uh-e4101-01-00, 5uh-e4101-10-00, 5uh-e4101-11-00, 5fu-14101-13-00, 5fu-e4101-01-00, 5te-e4101-10-00, 5te-14101-00-00, 5te-e4101-01-00, 5nd-e4101-11-00, 5nd-14101-00-00, 5nd-e4101-01-00, 5gh-14101-01-00, Carburetor Yfm 400, Big Bear 250 Carburetor, Kodiak 400 Carb, Wolverine 350 450 Carb, Carburetor, Carburettor, Carburetter, Carb, Carby, 1-barrel Carburetor, 1 Barrel Carburetor, 1 Barrel Carb, 1 Bbl Carburetor, 1 Bbl Carb ), ( Part Type: Carburetors Throttlebodies ), ( Placement On Vehicle: Front ), ( Quantity: 1 Piece As Show In The Picture ), ( Type: Carburetor ), ( Universal Fitment: No )

Review BFO Carburetor Yamaha Big fits BEAR KODIAK GRIZZLY YFM400 YFM450 400 450 350

The **BFO 1UFC8L Carburetor** is a high-performance, precision-engineered replacement for the stock carburetors found on Yamaha s legendary **Big Bear 400 (YFM400), Kodiak 450 (YFM450), and Grizzly 350 (YFM350)** off-road motorcycles. Designed to deliver superior throttle response, enhanced fuel efficiency, and reliable power output, this aftermarket carburetor is meticulously crafted to meet or exceed the performance standards of the original equipment while incorporating modern advancements in carburetion technology. Built with a durable **aluminum body** and reinforced internals, the BFO 1UFC8L is engineered to withstand the demands of heavy-duty off-roading, ensuring longevity and consistent performance even under the most extreme conditions. Its **precision-machined jets and float bowl** allow for fine-tuned fuel delivery, reducing hesitation and improving acceleration across the entire RPM range. The carburetor features a **smooth-bore intake passage** and optimized venturi design, which enhances airflow and minimizes turbulence, resulting in a more responsive and efficient engine. Whether tackling rough terrain, pulling heavy loads, or pushing the limits of your Yamaha s power, this carburetor ensures a seamless connection between throttle input and engine output. Additionally, the BFO 1UFC8L is compatible with a variety of fuel types, including standard gasoline and ethanol blends, making it a versatile choice for riders who prioritize both performance and adaptability. With its **easy installation** and compatibility with stock and upgraded intake systems, this carburetor is an ideal upgrade for those seeking to unlock the full potential of their Yamaha s legendary air-cooled V-twin engine.

### **Pros and Cons of buying a BFO 1UF-C8L Carburetor for Yamaha Big Bear 400 (YFM400), Kodiak 450 (YFM450), and Grizzly 350**

The **BFO 1UF-C8L** is a popular aftermarket carburetor designed to improve performance, throttle response, and fuel efficiency on Yamaha s Big Bear 400, Kodiak 450, and Grizzly 350 models. Below is a detailed breakdown of its advantages and drawbacks.

---

### **Pros**

1. **Improved Performance**

- The **1UF-C8L** is a high-performance carburetor with a larger bore (1.5 inches) compared to the stock carb, allowing for better airflow and increased horsepower.

- Many users report noticeable gains in **low-end torque** and **top-end power**, making the bike feel more responsive, especially in acceleration and hill climbing.

- The **floating needle jet system** allows for fine-tuning, which can help optimize performance for different riding conditions.

2. **Better Fuel Efficiency (Under Certain Conditions)**

- While carburetors are generally less fuel-efficient than fuel-injected systems, the **1UF-C8L** is designed to run leaner than stock in some cases, which can improve mileage if properly tuned.

- Some riders report better **cruising efficiency** due to smoother idle and reduced fuel waste.

3. **Easier Maintenance & Adjustability**

- Unlike stock carbs, the **BFO 1UF-C8L** has **easily accessible jets and needles**, allowing for quick adjustments without major disassembly.

- The **floating needle system** means you can swap jets to match different fuel types (e.g., pump gas, ethanol blends) without major modifications.

- Some users appreciate that it **doesn t require a full rebuild** as often as stock carbs, especially if maintained properly.

4. **Compatibility with Modifications**

- Since these bikes are often modified with **exhaust systems, cams, or headers**, the **1UF-C8L** pairs well with those upgrades, preventing a "choke" in airflow that can occur with stock carbs.

- Works well with **aftermarket air filters** (like K&N) for further performance gains.

5. **Reputation for Reliability**

- BFO (Big Four) carbs are known for **durability** and are widely used in the off-road community.

- Many riders have had **long-term success** with this carb, especially when paired with proper maintenance (clean jets, fresh fuel, etc.).

6. **Cost-Effective Upgrade**

- Compared to full fuel injection systems, the **1UF-C8L is relatively inexpensive** ( $200 $300 depending on market).

- Installation is **DIY-friendly** if you have basic mechanical skills, reducing labor costs.

7. **Improved Idle and Warm-Up Characteristics**

- Some users report a **smoother idle** and better warm-up behavior compared to stock carbs, which can be finicky on cold starts.

---

### **Cons**

1. **Requires Tuning for Optimal Performance**

- Unlike a stock carb, the **1UF-C8L is not drop-in ready** it needs **jet adjustments** to match your bike s setup (exhaust, cam, fuel type).

- **Mismatched tuning** can lead to **lean conditions, rough idle, or poor acceleration**, especially if you re not experienced with carb adjustments.

- Some riders struggle with **finding the right needle and jet combination**, which may require trial and error or professional help.

2. **Potential for Fuel Economy Trade-Offs**

- While some see slight improvements, others report **worse fuel efficiency** compared to stock, especially if the carb is not properly tuned.

- Running too lean can cause **pre-ignition (pinging)** or **poor throttle response**, negating performance gains.

3. **Maintenance Demands More Attention**

- Carburetors are **more sensitive to fuel quality** than fuel injection. Poor fuel (ethanol blends, old gas) can **clog jets quickly**, leading to performance issues.

- Requires **regular cleaning and jet checks**, unlike a stock carb that may run longer on dirty fuel.

- **Needle and jet wear** over time can degrade performance, requiring occasional replacements.

4. **Installation Can Be Tricky**

- While not extremely difficult, **carb swaps require careful throttle cable and linkage adjustments** to ensure proper throttle response.

- **Vacuum hoses and electrical connections** (for some models) must be reconnected correctly to avoid drivability issues.

- Some riders report **minor leaks** if the gaskets are not seated properly, leading to fuel waste.

5. **Not a "Set-and-Forget" Solution**

- Unlike fuel injection, carburetors **require periodic adjustments** as conditions change (altitude, temperature, fuel type).

- If you **don t tune it properly**, you might end up with **worse performance than stock**.

6. **Limited Longevity Compared to Fuel Injection**

- While durable, **carburetors can wear out** over time, especially if not maintained.

- **Needles, jets, and diaphragms** may need replacement every **50 100 hours** of use, depending on conditions.

7. **Potential for Overcomplication**

- Some riders prefer the **simplicity of stock carbs** or modern fuel injection, which don t require constant tuning.

- If you re not mechanically inclined, the **learning curve** of adjusting a carb can be frustrating.

---

### **Conclusion & Recommendation**

The **BFO 1UF-C8L carburetor** is a **solid upgrade** for Yamaha s Big Bear 400, Kodiak 450, and Grizzly 350 if you re looking to **boost performance, improve throttle response, and enjoy better tuning flexibility**. It s particularly well-suited for riders who:

- **Modify their bikes** (exhaust, cams, headers).

- **Want a balance between cost and performance** (cheaper than fuel injection but more effective than stock).

- **Are willing to put in the effort** to tune and maintain it properly.

However, it s **not a plug-and-play solution** it requires **knowledge of carburetor tuning** to avoid common pitfalls like lean running or poor idle. If you re not comfortable adjusting jets and needles, you may end up with **subpar results** or even **worse performance than stock**.

- **If you re experienced with carb tuning or willing to learn**, the **1UF-C8L is an excellent choice** for performance gains.

- **If you prefer simplicity and don t mind stock performance**, consider **keeping your stock carb** or upgrading to **fuel injection** (if budget allows).

- **If you re modifying your bike heavily**, the **1UF-C8L will complement those changes** better than stock.

- **For best results**, pair it with **high-quality fuel, regular maintenance, and a gradual tuning approach**.

**Bottom Line:** The **BFO 1UF-C8L is a great carb for serious off-road riders who want more power and control but it demands attention to detail.** If you re ready for that, it s a worthwhile upgrade. If not, stick with stock or consider fuel injection for a more hands-off solution.

Details:

Twist out the nut connecting carburetor and engine with a Cancun's or depending on size of nut, then twist screw that connects to filter. Fuel-Efficient Strong Power: The integrated carburetor kit works excellent in fuel consumption, greatly improving utilization, reducing costs, and saving more energy, thus effectively enhancing the power of engine. Guaranteed Fitment. Free US Shipping.

Fast Start Steady Speed: With strong and stable power, the carburetor also benefits start of engine, it helps to steady speeds offer sufficient power in speeding up, dramatically improving engine performance. For Yamaha Big Bear 250 2007 -2009, for 400 YFM 2x4 4x4. Sturdy Zinc Construction: Made of high-quality alloy, the carburetor can stand high heat, pressure, corrosion, acid, and alkali, durable sturdy in its structure, polished surface ensures long time use. 2001 - 2007, for Yamaha Bruin 250 YFM 2005 - 2006, 350 2x4 4x4.

Always the correct part. OE/Part number. Carburetor Fits For Yamaha Big Bear 400 YFM400 KODIAK 450 YFM450 Grizzly 350 Most. Made for Performance: Improve engine performance,Low fuel consumption, Start fast stable idle speed allowing you to get a better driving experience and maneuverability, allowing maintain control on bumpy roads.

Specifications. Then you can load him into the car. Quick, Simple. Finally, remove the throttle cable.

. Oil, unplug the oil pipe. Package included.

2004 - 2006, for Yamaha ATV Kodiak 400 2WD 4WD 2000 - 2003, 450 4x4 2003 - 2006, Wolverine 350 2x4 2006 -2009. Manufacturer.

specifications carbthrotatv:

• for models: Yfm400, Yfm450, 400, 450, 350, Bear, Kodiak, Grizzly
• for makes: Yamaha
• brand: Bfo
• mpn: 1ufc8l
• california prop 65 warning: California Prop 65 Warning
• choke type: Mechanical
• compatible make: For Yamaha
• compatible year: 2001-2009
• country of origin: China
• engine type: 4-stroke
• fit 2: For Yamaha Grizzly 350 2007-2011
• fit 3: For Yamaha Kodiak 400 Yfm400 2000-2006
• fit 4: For Yamaha Big Bear 400 2004-2006 Bruin 350
• fit 5: For Yamaha Grizzly 450 2007-2012
• fit 6: For Yamaha Wolverine 450 2007-2010
• fit for: For Yamaha Wolverine 350 2006-2009
• fitment type: Direct Replacement
• inner diameter: Intake Side
• items included: Gasket, Mounting Hardware
• machine type: Atv, Utv / Sxs
• manufacturer warranty: 2 Years
• material: Alloy, Aluminum
• note: No Instruction Included
• notice: This Is Aftermarket Replcement Part.
• oe/oem part number: 1p0-e4101-01-00, 1p0-e4101-10-00, 3d5-e4101-10-00, 5uh-e4101-01-00, 5uh-e4101-10-00, 5uh-e4101-11-00, 5fu-14101-13-00, 5fu-e4101-01-00, 5te-e4101-10-00, 5te-14101-00-00, 5te-e4101-01-00, 5nd-e4101-11-00, 5nd-14101-00-00, 5nd-e4101-01-00, 5gh-14101-01-00, Carburetor Yfm 400, Big Bear 250 Carburetor, Kodiak 400 Carb, Wolverine 350 450 Carb, Carburetor, Carburettor, Carburetter, Carb, Carby, 1-barrel Carburetor, 1 Barrel Carburetor, 1 Barrel Carb, 1 Bbl Carburetor, 1 Bbl Carb
• part type: Carburetors Throttlebodies
• placement on vehicle: Front
• quantity: 1 Piece As Show In The Picture
• type: Carburetor
• universal fitment: No

offer carbthrotatv:

• started: May 5, 2026
• best offers: True
• quantity: 10
• options: Ship-to-home
• availability: In Stock
• sold: 0

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• policy: Returns Accepted

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• type: Fixed
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• cost: $0.00
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• class: Standard

seller carbthrotatv:

• rating: 99.6%
• city: Houston, Texas
• # reviews: 7029

general carbthrotatv:

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

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