1. Carburetors & Throttlebodies ATV For Sale
  2. sku: 15931636334409611
  3. BFO 1YZOS2

BFO 1YZOS2 Carburetor Big

fits model: Yfm400, Yfm450, Yfm250b, 350, 400, 450, 250, Grizzly, Bear. make: Yamaha.

1yzos2 Bfo Carburetor For Yamaha Grizzly 350 400 450 Yfm400 Yfm450 Big Bear 250 Yfm250b

( Brand: Bfo ), ( Manufacturer Part Number: 1YZOS2 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Compatible Make: For Yamaha ), ( Compatible Year: 99 00 01 02 03 04 1999 2000 2001 2002 2003 2004 ), ( 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 ), ( Fits: Atv ), ( Inner Diameter: Intake Side ), ( Items Included: Gasket, Mounting Hardware ), ( Material: Alloy ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Part Type: Carburetors Throttlebodies ), ( Placement On Vehicle: Front ), ( Quantity: 1 Piece As Show In The Picture ), ( Type: Carburetor )

Review BFO Carburetor Yamaha Big fits GRIZZLY BEAR YFM400 YFM450 YFM250B 350 400 450 250

High-Performance BFO 1YZOS2 Carburetor for Yamaha Grizzly 350, 400, 450, YFM400, YFM450, and Big Bear 250/YFM250B

Experience unparalleled engine responsiveness and improved fuel efficiency with the BFO 1YZOS2 Carburetor, precision-engineered for Yamaha Grizzly 350, 400, 450, YFM400, YFM450, and Big Bear 250/YFM250B models.

This high-performance carburetor boasts a sophisticated design that optimizes air-fuel mixture delivery for exceptional combustion and power output. The BFO 1YZOS2 features a proven Mikuni Vikayo main jet, offering smoother idle, improved throttle response, and reduced emissions.

Designed with durability in mind, this carburetor features a corrosion-resistant body and high-quality components to ensure long-lasting performance under rugged off-road conditions. The easily adjustable fuel mixture screw and pilot jet allow for fine-tuning to suit specific riding conditions and preferences.

Installation is a breeze, with simple bolt-on compatibility, ensuring a hassle-free upgrade for enthusiasts looking to enhance their Yamaha Grizzly or Big Bear's performance. With the BFO 1YZOS2 Carburetor, you'll enjoy improved acceleration, better fuel economy, and increased horsepower, all while maintaining the legendary reliability you've come to expect from Yamaha.

Upgrade your Yamaha Grizzly or Big Bear today with the BFO 1YZOS2 Carburetor, and experience the difference a high-quality carburetor can make on your off-road adventures.

The BFO 1YZOS2 Carburetor is a popular choice for Yamaha Grizzly 350, 400, 450, YFM400, YFM450 Big Bear, and YFM250B models due to its performance and compatibility. Here are the pros and cons to help you make an informed decision:

Pros:

1. Improved throttle response: The BFO 1YZOS2 Carburetor is known for its quick throttle response, which enhances the overall riding experience.

2. Enhanced power delivery: This carburetor provides a smooth and consistent power delivery across the RPM range, making the bike more responsive and agile.

3. Better fuel efficiency: Some users report improved fuel efficiency with the BFO 1YZOS2 Carburetor, which can help reduce operating costs over time.

4. Easy installation: The installation process is relatively straightforward, and many users have successfully installed the carburetor themselves with the help of online guides and videos.

Cons:

1. Potential for jetting issues: The carburetor may require jetting adjustments to achieve optimal performance, which could be a challenge for some users.

2. Cost: Compared to stock carburetors, the BFO 1YZOS2 Carburetor can be more expensive, which may not be suitable for budget-conscious riders.

3. Potential engine noise: Some users have reported an increase in engine noise after installing the BFO 1YZOS2 Carburetor, which may be attributed to the improved throttle response and power delivery.

In conclusion, the BFO 1YZOS2 Carburetor offers improved throttle response, enhanced power delivery, and better fuel efficiency, making it an attractive option for performance-oriented Yamaha Grizzly owners. However, potential jetting issues, cost, and increased engine noise are factors to consider before making a purchase.

Recommendation: If you are looking to enhance the performance of your Yamaha Grizzly, the BFO 1YZOS2 Carburetor is a worthwhile investment. Just ensure that you are prepared to address potential jetting issues and are willing to accept a slight increase in engine noise for the performance benefits.

Details:

Then you can load him into the car. 2004 - 2006, for Yamaha ATV KODIAK 400 2WD 4WD 2000 - 2003, 450 4x4 2003 WOLVERINE 350 2x4 2006 2009. Oil, unplug the oil pipe. Specifications.

For Yamaha BIG BEAR 250 2007 - 2009, for 400 YFM 2x4 4x4. The carburetor is made of chrome-plated Zinc alloy which provides better wear resistance, insulation and heat resistance. Finally, remove the throttle cable.

Comes with shatterproof sealed and corrosion resistant case. 2006 - 2010, for Yamaha GRIZZLY 350 2x4 4x4. 2001 - 2007, for Yamaha BRUIN 250 YFM 2005 2006, 350.2x4 4x4. Improved air intake holes to improved airflow structure,stable performance and sensitive reaction,If your vehicle with issues of slow start, unstable idle speed, high fuel consumption, oil spill, poor speed power, Manufactured tested help deliver optimum engine capability.

Guaranteed Fitment Always the correct part. Package Content. 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. Fast, Shipping.

specifications carbthrotatv:

  • for models: Yfm400, Yfm450, Yfm250b, 350, 400, 450, 250, Grizzly, Bear
  • for makes: Yamaha
  • brand: Bfo
  • mpn: 1yzos2
  • california prop 65 warning: California Prop 65 Warning
  • compatible make: For Yamaha
  • compatible year: 99 00 01 02 03 04 1999 2000 2001 2002 2003 2004
  • 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
  • fits: Atv
  • inner diameter: Intake Side
  • items included: Gasket, Mounting Hardware
  • material: Alloy
  • note: No Instruction Included
  • notice: This Is Aftermarket Replcement Part.
  • part type: Carburetors Throttlebodies
  • placement on vehicle: Front
  • quantity: 1 Piece As Show In The Picture
  • type: Carburetor

shipping carbthrotatv:

  • type: Fixed
  • class: Standard
  • cost: $0.00
  • service: FedEx Ground / FedEx Home Delivery
  • carrier: FedEx
  • transit: 4-9 Days

returns carbthrotatv:

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

payments carbthrotatv:

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

seller carbthrotatv:

  • city: Rowland height, California
  • # reviews: 9747
  • rating: 98.8%

offer carbthrotatv:

  • quantity: 10
  • best offers: True
  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • started: November 29, 2025

general carbthrotatv:

  • ATV, Side-by-Side UTV Parts Accessories > Air Intake Fuel Delivery > Carburetors
  • condition: New
for models: yfm400, yfm450, yfm250b, 350, 400, 450, 250, grizzly, bear, for makes: yamaha, california prop 65 warning: california prop 65 warning, compatible make: for yamaha, compatible year: 99 00 01 02 03 04 1999 2000 2001 2002 2003 2004, 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, fits: atv, inner diameter: intake side, items included: gasket, mounting hardware, note: no instruction included, notice: this is aftermarket replcement part., part type: carburetors throttlebodies, placement on vehicle: front, quantity: 1 piece as show in the picture, type: carburetor,
category: atv parts > atv, side-by-side utv parts accessories > air intake fuel delivery > carburetors, material: alloy, sku: 15931636334409611,
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