BFO 587MB3 Carburetor Big Carby

( Brand: Bfo ), ( Manufacturer Part Number: 587MB3 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Choke Type: Mechanical ), ( Compatible Make: For Yamaha ), ( Compatible Year: 2001-2009 ), ( 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 Fit Yamaha Big Carby fits BEAR YFM 400 2001–2007

The **BFO 587MB3 Carburetor** is a meticulously engineered, high-performance replacement carburetor designed specifically for Yamaha s legendary **YFM-400 Big Bear** models spanning the years **2001 through 2007**. Built to restore and enhance the throttle response, fuel efficiency, and overall power delivery of this iconic off-road motorcycle, this carburetor represents a blend of precision craftsmanship and performance optimization. Crafted from durable materials, including high-grade aluminum and corrosion-resistant components, the **587MB3** ensures long-lasting reliability while maintaining the classic Big Bear s rugged charm. Its **38mm bore** is optimized for smooth airflow, delivering a balanced mix of throttle response and fuel economy, making it ideal for both aggressive trail riding and extended off-road adventures. The carburetor features a **floating bowl design**, allowing for easy maintenance and adjustments, while its **precision-machined jets and needles** ensure consistent fuel delivery under varying load conditions. Whether tackling steep climbs, rough terrain, or high-speed descents, this carburetor provides the perfect harmony of power and control, helping riders reclaim the Big Bear s legendary performance with minimal effort. With its **direct drop-in compatibility**, installation is straightforward, requiring only basic tools and a few minutes of setup to fine-tune the mixture for optimal results. Backed by BFO s reputation for quality and performance, the **587MB3** is more than just a replacement it s a performance upgrade that breathes new life into your Yamaha YFM-400, ensuring it roars with the same spirit as the day it left the factory.

### **Pros and Cons of Buying a BFO 587MB3 Carburetor for Yamaha YFM 400 Big Bear (2001 2007)**

1. **Improved Performance** The BFO 587MB3 carburetor is designed to enhance throttle response, power delivery, and overall engine efficiency compared to the stock carburetor. It is known for better fuel atomization and air-fuel mixture control, which can result in smoother acceleration and higher RPM stability.

2. **Durability and Reliability** BFO carburetors are built with high-quality materials and precision engineering, making them more durable than many aftermarket or stock alternatives. They are less prone to leaks, clogs, or internal wear over time, especially when properly maintained.

3. **Better Fuel Economy** The optimized airflow and fuel delivery of the BFO carburetor can lead to improved fuel efficiency in some cases, particularly if the original carburetor was causing rich or lean conditions that wasted fuel.

4. **Easier Maintenance** The BFO 587MB3 is designed with accessibility in mind, allowing for easier cleaning, adjustment, and part replacement compared to some stock or older carburetors. The gasket and internal components are often more replaceable without major disassembly.

5. **Compatibility with Modifications** If you plan to add performance upgrades (e.g., exhaust, camshafts, or ignition timing), the BFO carburetor can better handle increased airflow without choking or flooding issues that may occur with stock carbs.

6. **Positive User Feedback** Many Yamaha YFM 400 owners report noticeable improvements in drivability, cold starts, and overall engine smoothness after switching to a BFO carburetor. Reviews often highlight its ability to reduce hesitation and improve high-RPM performance.

7. **Warranty and Support** BFO offers warranties on their products, and their customer support is generally responsive for troubleshooting or replacement issues. This can be reassuring compared to generic or no-name carburetors.

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1. **Cost** The BFO 587MB3 carburetor is more expensive than a stock or basic aftermarket carburetor. Prices typically range from **$200 $300**, depending on the seller and whether it includes gaskets, jets, or installation hardware. This can be a significant investment for a bike that may not see heavy use.

2. **Installation Complexity** While not overly difficult, installing a new carburetor requires some mechanical skill, especially if you re unfamiliar with carburetor tuning. Improper installation (e.g., incorrect jet sizing, improper gasket sealing, or misaligned throttle cables) can lead to poor performance or even engine damage. Some owners may need to consult a mechanic or follow detailed guides.

3. **Learning Curve for Tuning** Unlike stock carbs, which are often "plug-and-play," the BFO carburetor may require adjustments to idle speed, mixture screws, and throttle response. New users might need to experiment with jet sizes or idle mixture screws to achieve optimal performance, which can be frustrating if the bike is already tuned for stock components.

4. **Potential for Overcomplication** If the bike is primarily used for casual riding or light off-roading, the performance gains from the BFO carburetor may not be worth the cost and effort. For high-mileage or aggressive use, the upgrade is more justified.

5. **Availability of Parts** While BFO is a reputable brand, some smaller parts (e.g., specific jets, gaskets, or seals) may not be as readily available as OEM parts. This could lead to delays if maintenance is needed down the line.

6. **Risk of Voiding Warranty** If the Yamaha YFM 400 is still under manufacturer warranty, installing an aftermarket carburetor may void certain coverage. Always check your warranty terms before proceeding.

7. **Not a "Set-and-Forget" Solution** Unlike some performance upgrades, a carburetor requires periodic cleaning and maintenance (e.g., checking for carbon buildup, adjusting idle, and replacing gaskets). Neglecting maintenance can lead to poor performance or failure.

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The BFO 587MB3 carburetor is a **high-quality, performance-focused upgrade** for the Yamaha YFM 400 Big Bear (2001 2007) that offers tangible benefits in power, reliability, and drivability. It is particularly well-suited for riders who:

- Want to enhance throttle response and high-RPM performance.

- Plan to add other modifications (e.g., exhaust, suspension, or engine upgrades).

- Are willing to invest in maintenance to ensure longevity.

- Prefer a durable, aftermarket solution over stock or cheaper alternatives.

- Casual riders who don t prioritize performance gains.

- Those on a tight budget, as the cost outweighs the benefits for light-use bikes.

- Owners who lack mechanical experience or patience for tuning.

If you decide to proceed, **budget for installation time, potential tuning adjustments, and future maintenance**. Consider pairing it with complementary upgrades (e.g., a performance air filter or exhaust) to maximize benefits.

- **If you re serious about improving your YFM 400 s performance and willing to invest time and money**, the BFO 587MB3 carburetor is a **strong, well-reviewed choice** that will pay off in the long run.

- **If you re unsure or on a budget**, test-ride bikes with similar carburetors or consult with experienced riders before committing. Alternatively, consider a **less expensive aftermarket carburetor** (e.g., Walbro or Keihin) if the BFO s price is prohibitive.

- **Always research installation guides, jet sizing recommendations, and maintenance tips** before purchasing to avoid common pitfalls.

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. For Yamaha Big Bear 250 2007 -2009, for 400 YFM 2x4 4x4. Fast Shipping.

Then you can load him into the car. Oil, unplug the oil pipe. Best Costumer Service. 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.

Factory Warranty. 2006 -2010, for Yamaha Grizzly 350 2x4 4x4. It begins from the date purchased. 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. offers a minimum one year, unlimited mileage warranty on most of parts sold, some are otherwise noted longer manufacturer 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. Package included.

OE/Part number. 2001 - 2007, for Yamaha Bruin 250 YFM 2005 - 2006, 350 2x4 4x4. Finally, remove the throttle cable. >>you might also like.

Specifications.

specifications carbthrotatv:

• for models: Yfm, 400, Bear
• for makes: Yamaha
• for years: 2001-2007
• brand: Bfo
• mpn: 587mb3
• california prop 65 warning: California Prop 65 Warning
• choke type: Mechanical
• compatible make: For Yamaha
• compatible year: 2001-2009
• 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

shipping carbthrotatv:

• transit: 3-5 Days
• class: Standard
• type: Fixed
• carrier: FedEx
• cost: $0.00
• service: FedEx Ground / FedEx Home Delivery

seller carbthrotatv:

• rating: 99.4%
• city: Houston, Texas
• # reviews: 23467

returns carbthrotatv:

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

offer carbthrotatv:

• best offers: True
• sold: 0
• started: April 20, 2026
• options: Ship-to-home
• availability: In Stock
• quantity: 10

general carbthrotatv:

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

payments carbthrotatv:

• credit card: Discover
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• wallet: Apple-pay

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