BFO 0WMF78 Carburetor Carb Atv

( Brand: Bfo ), ( Manufacturer Part Number: 0WMF78 ), ( Air Filter Mount Inner Diameter: 55mm ), ( Air Filter Mount Outer Diameter: 58mm ), ( Bundle Description: Carburetor For Polaris Base Cover Rubber Ring Filter Screws ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Choke Type: Mechanical ), ( Custom Bundle: Yes ), ( Engine Type: 4-stroke ), ( Fitment Type: Direct Replacement ), ( Intake Side Inner Diameter: 40mm ), ( Intake Side Outer Diameter: 46mm ), ( Items Included: Gasket, Mounting Hardware, O-rings ), ( Machine Type: Atv ), ( Manufacturer Warranty: 2 Years ), ( Material: Alloy, Aluminum ), ( Mounting Flange Type: Bolt On ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Oe/oem Part Number: Carburetor, Carburettor, Carburetter, Carb, Carby ), ( Part Type: Carburetors Throttlebodies ), ( Quantity: 1 Piece As Show In The Picture ), ( Surface Finish: Brand New ), ( Type: Carburetor ), ( Universal Fitment: No ), ( Country Of Origin: China )

Review BFO New Carburetor Carb Polaris Atv fits RANGER SCRAMBLER 400 425 500

The **BFO 0WMF78 Carburetor** is a meticulously engineered, high-performance replacement carburetor designed specifically for Polaris Ranger ATV models, including the 400, 425, and 500cc scrambler variants. Crafted with precision and built to exacting standards, this carburetor is engineered to restore optimal fuel delivery, throttle response, and overall engine efficiency, ensuring your ATV runs with the power and reliability it was originally intended for. The 0WMF78 features a robust, durable construction with high-quality materials, including a corrosion-resistant body and precision-machined internals that guarantee smooth operation and longevity. Its compact yet robust design allows for seamless integration with the Polaris engine, maintaining the stock performance characteristics while offering enhanced durability and performance compared to aftermarket alternatives. The carburetor incorporates a reliable float bowl system with a sealed gasket to prevent fuel leaks, ensuring consistent fuel flow and minimizing the risk of clogs or malfunctions. Whether you're tackling rough terrain, cruising on trails, or pushing your ATV to its limits, this carburetor delivers the precise fuel mixture needed for peak performance. Its compatibility with standard Polaris components makes installation straightforward, allowing mechanics and DIY enthusiasts alike to upgrade their ATV with confidence. Built to withstand the demands of off-road use, the BFO 0WMF78 carburetor is an ideal choice for riders seeking a balance of performance, reliability, and ease of maintenance. With its reputation for quality and precision, this carburetor is a trusted upgrade for those looking to restore their Polaris Ranger to factory specifications or enhance its power output.

The **BFO 0WMF78 carburetor** is a popular aftermarket replacement for Polaris Ranger 400/425/500 Scrambler ATVs, designed to improve performance, fuel efficiency, and throttle response. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros of the BFO 0WMF78 Carburetor**

1. **Enhanced Performance**

The BFO carburetor is engineered to provide a richer, more balanced fuel-air mixture, which can result in smoother acceleration, better top-end power, and improved overall engine response. Many users report a noticeable increase in throttle smoothness and power delivery, especially in off-road conditions where the engine is frequently stressed.

2. **Improved Fuel Efficiency**

Unlike stock carburetors, which often run lean (especially under heavy loads), the BFO carburetor is tuned to deliver a more consistent fuel supply. This can lead to better fuel economy, particularly in mixed riding conditions where the engine is frequently shifted between low and high RPMs.

3. **Better Cold-Start Performance**

The BFO carburetor features an improved idle circuit and cold-start mechanism, which helps prevent stalling or hesitation when starting the engine in cold weather. This is particularly useful for riders in colder climates or those who frequently ride in varying temperatures.

4. **Easier Maintenance and Adjustability**

The BFO carburetor is designed with user-friendly adjustments, including a precision idle screw and a main jet system that allows for fine-tuning. This makes it easier to optimize performance without requiring extensive mechanical knowledge. Additionally, the carburetor is built to last longer than stock units, reducing the frequency of replacements.

5. **Compatibility with Modifications**

If you ve made other modifications to your Polaris Ranger (such as exhaust upgrades, air filters, or ignition tweaks), the BFO carburetor can help balance the increased airflow and power output. It s a versatile upgrade that pairs well with other performance enhancements.

6. **Durability and Quality**

BFO is a well-respected brand in the ATV and motorcycle aftermarket, known for producing reliable carburetors. The 0WMF78 is built with precision-machined components and high-quality materials, reducing the likelihood of leaks or internal wear compared to stock carburetors.

7. **Reduced Backfiring and Harsh Idling**

Many stock carburetors suffer from backfiring or rough idling due to improper fuel delivery. The BFO carburetor s refined tuning helps eliminate these issues, resulting in a quieter and more stable idle.

---

### **Cons of the BFO 0WMF78 Carburetor**

1. **Cost**

The BFO 0WMF78 carburetor is more expensive than an OEM replacement. While it s a worthwhile investment for serious riders, budget-conscious owners may hesitate if they re only looking for minor improvements. Pricing can vary, but it typically costs significantly more than a stock carburetor.

2. **Installation Complexity**

While not overly difficult, installing a BFO carburetor requires some mechanical skill. You ll need to remove the stock carburetor, clean the intake manifold, and ensure proper gasket sealing. If you re not comfortable with carburetor work, you may need to pay a mechanic for installation, adding to the overall cost.

3. **Learning Curve for Tuning**

The BFO carburetor offers adjustability, but improper tuning can lead to issues such as rich running (wasting fuel), lean running (risking engine damage), or poor idle stability. New users may need to experiment with the idle screw and main jets to find the optimal setting, which can be frustrating if they lack experience with carburetor adjustments.

4. **Potential for Over-Tuning**

If you re not careful, adjusting the carburetor too aggressively (e.g., using larger jets than recommended) can lead to excessive fuel consumption, poor throttle response, or even engine damage. This is more of a risk if you re not familiar with carburetor tuning principles.

5. **Limited Longevity with Poor Maintenance**

Like any carburetor, the BFO 0WMF78 will perform best if regularly maintained. Neglecting to clean the carburetor, replace the air filter, or check for leaks can lead to premature wear or failure. However, this is true of any carburetor, not just the BFO.

6. **Compatibility with Stock Ignition Systems**

In some cases, pairing the BFO carburetor with a stock ignition system (especially on older models) may not yield the best results. If you ve upgraded your ignition or spark plugs, the benefits of the carburetor will be more noticeable. However, even with stock ignition, the BFO still provides improvements.

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

Unlike fuel-injected systems, carburetors require periodic checks and adjustments to maintain optimal performance. You ll need to periodically inspect the idle mixture, check for vacuum leaks, and ensure the float level is correct. This adds a small amount of maintenance compared to a stock carburetor.

---

### **Conclusion**

The **BFO 0WMF78 carburetor** is one of the best aftermarket upgrades available for Polaris Ranger 400/425/500 Scrambler ATVs. Its primary strengths lie in **improved performance, fuel efficiency, cold-start reliability, and adjustability**, making it a favorite among riders who want a noticeable boost in their ATV s capabilities. The quality and durability of the BFO carburetor also justify its higher cost compared to OEM replacements.

However, the **higher upfront cost, installation complexity, and need for proper tuning** may deter some riders, particularly those on a tight budget or who prefer simpler modifications. If you re already familiar with carburetor work or plan to make other performance upgrades, the BFO carburetor is an excellent choice. For riders who want a more straightforward solution, alternatives like **Walbro or Keihin carburetors** (if available for your model) or even **fuel injection conversions** (for more advanced setups) might be worth considering.

---

### **Recommendation**

- You want a noticeable improvement in power, throttle response, and fuel efficiency.

- You re willing to invest in a high-quality aftermarket part that will last longer than stock.

- You re comfortable with basic carburetor maintenance and tuning (or are prepared to learn).

- You ve made or plan to make other performance modifications (e.g., exhaust, air filter, ignition).

- You ride in varying conditions (hot/cold weather, mixed terrain) where a stock carburetor may struggle.

- You re on a tight budget and only want minor improvements.

- You ve never worked on a carburetor before and aren t willing to learn.

- You prefer a "set-and-forget" solution (e.g., fuel injection) over a carburetor.

- You primarily ride in very light conditions (e.g., mostly highway or easy trails) where a stock carburetor performs adequately.

For the **Polaris Ranger 400/425/500 Scrambler**, the **BFO 0WMF78 carburetor is one of the best upgrades available** and is highly recommended for riders seeking a balance of performance, reliability, and adjustability. If you re serious about optimizing your ATV s power and drivability, this is a worthwhile investment. Just be prepared for the slight learning curve and maintenance requirements that come with carburetor tuning.

Details:

Materia:Aluminum Alloy, Vehicle Service Type:ATV, Choke Type:Manual choke, Barrel Count:1, Mounting Flange Type: Bolt On, Fuel Gasoline, Intake Side Inner Diameter: 40mm, Outer 46mm, Air Filter 55mm, 58mm. 4.100% tested For reliability and performance, backed by satisfying after-sales service. 1.Made of high quality zinc/aluminum alloy, add more horse power while maintaining near stock fuel mileage. To ensure correct purchase, please compare carburetor against picture before you purchase.

2.Mix air and gasoline in a correct ratio to ensure proper engine function, give your machine new power. Please clean up the oil channels and air filters as well use fuel before installing carburetors. 3.Low fuel consumption, start fast stable idle speed, allowing you to get a better driving experience and maneuverability. 1x Carburetor.

It begins from the date purchased. Specifications. Package Content. For Polaris Sportsman 500 4X4 HO 2001 -2005, RSE 2001, DUSE 2010 -2012.

specifications carbthrotatv:

• for models: 400, 425, 500, Ranger, Scrambler
• for makes: Polaris
• brand: Bfo
• mpn: 0wmf78
• air filter mount inner diameter: 55mm
• air filter mount outer diameter: 58mm
• bundle description: Carburetor For Polaris Base Cover Rubber Ring Filter Screws
• california prop 65 warning: California Prop 65 Warning
• choke type: Mechanical
• custom bundle: Yes
• engine type: 4-stroke
• fitment type: Direct Replacement
• intake side inner diameter: 40mm
• intake side outer diameter: 46mm
• items included: Gasket, Mounting Hardware, O-rings
• machine type: Atv
• manufacturer warranty: 2 Years
• material: Alloy, Aluminum
• mounting flange type: Bolt On
• note: No Instruction Included
• notice: This Is Aftermarket Replcement Part.
• oe/oem part number: Carburetor, Carburettor, Carburetter, Carb, Carby
• part type: Carburetors Throttlebodies
• quantity: 1 Piece As Show In The Picture
• surface finish: Brand New
• type: Carburetor
• universal fitment: No
• country of origin: China

returns carbthrotatv:

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

general carbthrotatv:

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

payments carbthrotatv:

• other
• wallet: Apple-pay
• credit card: Visa

shipping carbthrotatv:

• transit: 4-7 Days
• service: FedEx Ground / FedEx Home Delivery
• cost: $0.00
• carrier: FedEx
• type: Fixed
• class: Standard

offer carbthrotatv:

• quantity: 4
• started: May 14, 2026
• best offers: True
• availability: In Stock
• sold: 0
• options: Ship-to-home

seller carbthrotatv:

• # reviews: 16612
• rating: 99.6%
• city: Houston, Texas

Bfo 0WMF78 Is Similar To:

• Pqu12c Bfo Carburetor For Arctic Cat Atv Quad Carb (41.6% similar) For arctic cat DVX400 2004 -2007. Not fit for arctic cat 4X4 2006 , 400VP manual shift model's. Our carburetor has the absolute vacuum pipe, work properly. For arctic cat: 3470-023 3470-031 3470-035. New carburetor fit for arctic cat atv 350 366 400 carb 0470-737 2008 -2016 2017 . The Bfo PQU12C...(December 17th, 2021)
• I3lmeg Bfo Carburetor Carb For Polaris Scrambler Awd (67.7% similar) Carburetor fits for polaris sportsman 500 4X4 2001 -2005 2010 2011 2012 . For polaris atv. Scrambler 500 2007 . Scrambler 400 1999 . 1x carburetor for polaris. Big boss 500 6X6 1998 -2002. Explorer 500 4X4 1997 . The Bfo I3LMEG is in new condition...(December 23rd, 2021)
• Vnd0xi Bfo Carburetor For Polaris Scrambler (61% similar) Carburetor fits for polaris sportsman 500 4X4 2001 -2005 2010 2011 2012 . For polaris atv. Scrambler 400 1999 . Scrambler 500 2007 . Magnum 4X4 1995 -1998. Carburetor replace for arctic cat 400 500 2X4 4X4 2002 2003 atv 0470-504 carb. The Bfo VND0XI is in new condition...(December 24th, 2021)
• Lxa8r6 Bfo Carburetor For Polaris Sportsman Duse Ho Rse (49.2% similar) Carburetor fits for polaris sportsman 500 4X4 2001 -2005 2010 2011 2012 . Hawk eye 400 ho 2012 - 2014 . For polaris atv. Sportsman 400 ho 4X4 2012 - 2014 . Sportsman 400 ho 4X4 se 2014 . Sportsman 500 4X4 non-ho 1999 -2004. The Bfo LXA8R6 is in new condition...(December 25th, 2021)
• 837l1b Bfo Carburetor Fits For Honda Trx Sportrax Atv Carb Assembly (43.7% similar) For Honda TRX400 Sportrax 2001 -2006. For Honda TRX400 Sportrax 2007 -2015. 1 x carburetor. Carburetor carb kit for Honda ACT 350 x 350X 1985 -1986 with throttle base cover. Carburetor carb for Honda CRF250R 2004 -05 CRF250X 2004 -13 RMZ250 2004 -09 WR250. The Bfo 837L1B is in new condition...(January 3rd, 2022)
• M4terp Bfo Carburetor Carb Fit For Arctic Cat Atv Red Green (46.3% similar) New carburetor carb for arctic cat 250 300 2X4 4X4 2001 - 2005 atv 0470-448. For arctic cat atv 250 2X4 green 2002 - 2005 . For arctic cat atv 250 2X4 red 2002 - 2005 . For arctic cat atv 300 2X4 red 2001 - 2003 . The Bfo M4TERP is in new condition...(January 5th, 2022)
• 0ghn63 Bfo New Carburetor For Suzuki Quadrunner (47.5% similar) Carburetor carb for Suzuki quad runner LT160 LT-F160 1991 -2001 13200-02C03. For Suzuki quad runner LT160 2002 -2003. For Suzuki quad runner LT160E 1989 -1992. For Suzuki quad runner LT-F160 1991 -2001. Carburetor for Suzuki ALT125 LT125 1983 -1987 185 quad runner 13200-18912. The Bfo 0GHN63 is...(January 7th, 2022)
• 5qbr4g Bfo Carburetor Carb Fits For Arctic Cat Atv Red Green (45.9% similar) New carburetor carb for arctic cat 250 300 2X4 4X4 2001 -2005 atv. For arctic cat atv 250 2X4 green 2002 . For arctic cat atv 250 2X4 red 2002 . For arctic cat atv 250 2X4 green 2003 . For arctic cat atv 250 2X4 red 2003 . The Bfo 5QBR4G is in new condition...(January 12th, 2022)
• Rmzd9s Bfo Carburetor Carb Fit For Yamaha Grizzly Atv Raptor (45.9% similar) New carburetor for 2001 -2005 for Yamaha for raptor 660 660R YFM660 FM 660R carb. For Yamaha for raptor 660 2001 -2005. 1x carburetor. Drive belt for Yamaha atv YFM700 grizzly 700 fi 4WD 2007 -2020 B16-E7641-00-00. The Bfo RMZD9S is in new condition...(January 13th, 2022)
• Dixq6g Bfo New Carburetor Fit For Honda Atv Foreman Rancher Fe (45.3% similar) For Honda TRX350 rancher 350 2000 -2006. For Honda TRX350 footrace 1986 -1987. For Honda most year of Honda ACT 250, TRX250 TRX300 TRX350 TRX400 TRX450 etc. For Honda TRX350TE rancher 2000 -2006. For Honda TRX400FW foreman 1995 -2005. The Bfo DIXQ6G is in new condition...(January 14th, 2022)
• N8gct1 Bfo Carburettor Carb Fit Yamaha Rhino (43.7% similar) Fit for Yamaha rhino 660 carburetor 2004 2005 2006 2007 YXR660. For Yamaha rhino 660 2004 - 2007 . For Yamaha grizzly 600 1998 -2001. For Yamaha grizzly 660 2002 -2008. Ignition spark plug CID box 1995 for Kodiak for Yamaha YFM400FW 4GB-85540-00-00. The Bfo N8GCT1 is in new condition...(January 15th, 2022)