BFO HLUP48 Carburetor Big

( Brand: Bfo ), ( Manufacturer Part Number: HLUP48 ), ( 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 Quality Carburetor Yamaha Big fits BEAR WOLVERINE YFM400 YFM 400 350 2006–2009

The **BFO HLUP48 Carburetor** is a meticulously engineered, high-performance replacement for the stock carburetor found on Yamaha s legendary **Big Bear 400 (YFM/YFM400, model years 2006 2009)** and the **Wolverine 350**, offering a seamless blend of reliability, precision, and raw power. Designed to outperform the stock unit while maintaining ease of installation and tuning, this carburetor is built to elevate the performance of your off-road machine without compromising on durability. Crafted from high-grade materials, the HLUP48 features a **precision-machined body** with a **smooth-bore main jet** and **optimized venturi design**, ensuring consistent fuel delivery under varying load conditions whether you're carving through rough terrain, hitting high RPMs, or cruising at lower speeds. Its **sealed needle and jet assembly** minimizes fuel leakage and contamination, while the **adjustable pilot screw** allows for fine-tuning of idle and low-end performance, giving you better throttle response and smoother operation. The carburetor s **durable brass construction** resists corrosion and wear, making it ideal for the demanding conditions of off-road riding, and its **O-ring sealed gaskets** ensure a tight, leak-proof fit with minimal maintenance. Whether you're chasing speed on the trail or pushing the limits of your Big Bear or Wolverine, the BFO HLUP48 delivers a noticeable boost in horsepower and torque, all while retaining the stock engine s reliability. Backed by BFO s reputation for quality and performance, this carburetor is a game-changer for riders looking to unlock the full potential of their Yamaha without the hassle of complex modifications.

### **Pros and Cons of Buying a BFO HLUP48 Carburetor for a Yamaha Big Bear 400 (YFM/YFM408, 2006-2009) or Wolverine 350**

1. **Improved Performance** The HLUP48 is a high-performance carburetor designed for better throttle response, smoother acceleration, and increased horsepower compared to the stock carburetor. It features a larger venturi and optimized airflow, which can enhance overall engine efficiency.

2. **Better Fuel Economy (Under Certain Conditions)** While carburetors are generally less fuel-efficient than modern fuel-injected systems, a well-tuned HLUP48 can provide a more consistent fuel-air mixture, reducing lean conditions that waste fuel.

3. **Easier to Tune Than Stock** The HLUP48 has a more straightforward adjustment process compared to some stock carbs, allowing for finer control over idle, mid-range, and high-speed performance with basic tools.

4. **Durability & Reliability** BFO (Bike Fuel Optimization) carbs are built with high-quality materials and are designed to handle the demands of off-road use better than some aftermarket alternatives that may clog or fail under heavy loads.

5. **Compatibility with Modifications** If you ve made other engine modifications (e.g., headers, camshafts, or exhaust), the HLUP48 can better support those upgrades by providing the necessary fuel delivery for peak performance.

6. **Easier to Source Parts & Tuning Help** BFO is a well-known brand in the off-road community, so finding replacement parts, gaskets, or tuning guides is relatively straightforward compared to lesser-known manufacturers.

7. **Reduced Carbon Buildup** A properly tuned HLUP48 can help prevent excessive carbon deposits on valves and pistons by maintaining a cleaner fuel-air mixture, which is especially beneficial in high-compression or turbocharged setups (though your Big Bear/Wolverine is naturally aspirated).

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1. **Learning Curve for Tuning** Unlike a stock carburetor, which may run "close enough" out of the box, the HLUP48 requires careful adjustment of the idle mixture screw, pilot jet, and main jet to avoid rich or lean conditions. Poor tuning can lead to poor performance, excessive fuel consumption, or even engine damage.

2. **Potential for Flooding or Hard Starting** If the carburetor is not properly broken in or if the pilot jet is too large, the engine may flood or struggle to start, especially in cold conditions.

3. **Not a "Plug-and-Play" Solution** Simply swapping in the HLUP48 without adjusting the pilot and main jets, or recalibrating the idle mixture, will not guarantee improved performance. Some users report worse-than-stock results if they don t take the time to tune it properly.

- A new air filter (to match the carb s airflow)

- A fuel line upgrade (if your stock line is too small)

- A new choke cable or linkage (if worn)

- A fuel pump upgrade (if your stock pump can t keep up with the increased demand)

- A new exhaust system (if you re pushing for more power, backpressure changes may be needed)

5. **Potential for Clogging** Like all carbs, the HLUP48 can clog over time if fuel quality is poor or if it s not cleaned regularly. Off-road use with dirty fuel can accelerate this issue.

6. **Limited Benefits for Stock Engines** If your Big Bear/Wolverine is running stock internals (cams, pistons, compression ratio), the gains from the HLUP48 may be modest. The real performance boost comes when paired with other upgrades (e.g., headers, camshafts, or a larger clutch).

7. **Resale Value Impact** While not a major concern for most off-road bikes, a heavily modified carb setup (especially with aggressive tuning) may deter potential buyers who prefer stock or simpler setups.

---

### **Conclusion & Recommendation**

The **BFO HLUP48 is a solid upgrade for your Yamaha Big Bear 400 or Wolverine 350**, particularly if you ve made or plan to make other performance modifications. It offers noticeable improvements in throttle response, mid-range power, and tunability compared to the stock carburetor. However, it is **not a "set it and forget it" solution** proper tuning is essential to avoid common pitfalls like flooding, poor fuel economy, or even engine damage.

#### **Who Should Buy It?**

- **Off-road riders** who want better throttle control and power for trail riding.

- **Those with modified engines** (headers, cams, exhaust) that need a carburetor capable of handling increased airflow.

- **Enthusiasts willing to invest time in tuning** to get the most out of the upgrade.

#### **Who Should Avoid It?**

- **Casual riders** who want minimal hassle and don t mind stock performance.

- **Those who can t or won t tune it properly** a poorly adjusted carb can be worse than stock.

- **Budget-conscious buyers** who would rather spend money on other upgrades (e.g., fuel injection) instead of a carburetor.

If you re serious about improving your Big Bear/Wolverine s performance and don t mind spending time tuning, the **BFO HLUP48 is a worthwhile investment**. Pair it with a **clean fuel system, proper air filter, and a basic tuning guide** (or professional help if needed) to ensure the best results. If you re unsure about tuning, consider starting with a **less aggressive carburetor** (like a stock replacement with minor upgrades) before committing to the HLUP48.

- Upgrading your **fuel line** to a larger diameter if stock.

- Using **high-quality fuel** (100 octane) to prevent clogging.

- Checking **valve clearance and ignition timing** after installation, as carburetor changes can affect engine balance.

Details:

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. OE/Part number. 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. Then you can load him into the car.

Guaranteed Fitment Always the correct part. 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. 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. Telephone number.

2001 - 2007, for Yamaha Bruin 250 YFM 2005 - 2006, 350 2x4 4x4. For Yamaha Big Bear 250 2007 -2009, for 400 YFM 2x4 4x4. 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. 2004 - 2006, for Yamaha ATV Kodiak 400 2WD 4WD 2000 - 2003, 450 4x4 2003 - 2006, Wolverine 350 2x4 2006 -2009.

Specifications. Finally, remove the throttle cable. Fast Shipping. Oil, unplug the oil pipe.

Product Quality Carburetor for Yamaha Big Bear 400 YFM YFM400 06-09 WOLVERINE 350. Package included.

specifications carbthrotatv:

• for models: Yfm400, Yfm, 400, 350, Bear, Wolverine
• for makes: Yamaha
• for years: 2006-2009
• brand: Bfo
• mpn: Hlup48
• 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

payments carbthrotatv:

• other
• wallet: Apple-pay
• credit card: Diners-club

shipping carbthrotatv:

• type: Fixed
• service: FedEx Ground / FedEx Home Delivery
• cost: $0.00
• transit: 3-8 Days
• class: Standard
• carrier: FedEx

offer carbthrotatv:

• options: Ship-to-home
• sold: 0
• best offers: True
• quantity: 4
• started: May 11, 2026
• availability: In Stock

general carbthrotatv:

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

returns carbthrotatv:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

seller carbthrotatv:

• rating: 99.7%
• # reviews: 13849
• city: Houston, Texas

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