MAXPEEDINGRODS NJ78AU Carburetor Big Electric Choke Atv 4-STROKE

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: NJ78AU ), ( Air Filter Mount Inner Diameter: 1.81 ), ( Air Filter Mount Outer Diameter: 1.97 ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Choke Type: Mechanical ), ( Compatible Make: For Yamaha ), ( Compatible Year: 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989, 1988, 1987 ), ( Drive Type: Electric Choke ), ( Engine Type: 4-stroke ), ( Features: With E-choke ), ( Fitment 1: For Yamaha Warrior 350 Yfm350x 1987-2004 ), ( Fitment 2: For Yamaha Big Bear 350 Yfm350fw 4x4 1996-1998 ), ( Fitment 3: For Yamaha Big Bear 350 Yfm350u 1996-1998 ), ( Fitment 4: For Yamaha Wolverine 350 Yfm350fx 4x4 1995 ), ( Fitment 5: For Yamaha Kodiak 400 Yfm400fw 4x4 1993-1998 ), ( Fitment Type: Direct Replacement ), ( Intake Side Inner Diameter: 1.42 ), ( Intake Side Outer Diameter: 1.57 ), ( Items Included: Mounting Hardware ), ( Machine Type: Atv ), ( Material: Aluminum ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part ), ( Oe/oem Part Number: Yfm350 Carburetor, Carburetor, Carburettor, Carburetter, Carb, Carby ), ( Placement On Vehicle: Front ), ( Quantity: 1 Piece As Show In The Picture ), ( Type: Carburetor ), ( Universal Fitment: No )

Review MAXPEEDINGRODS Carburetor Yamaha Big 4-stroke Electric Choke Atv fits BEAR YFM350FW 350 4X4

The **Maxpeedingrods NJ78AU carburetor** is a meticulously engineered, high-performance replacement part designed specifically for the Yamaha Big Bear 350 (YFM350FW) 4x4 ATV, delivering a seamless blend of reliability and enhanced throttle response. Crafted from precision-machined components, this carburetor features a **4-stroke electric choke system**, ensuring smooth cold starts and optimal fuel delivery from the first rev to the last. The NJ78AU is built to meet or exceed OEM specifications, guaranteeing a perfect fit with the Big Bear s stock engine bay while incorporating subtle yet impactful modifications that elevate performance. Its **durable aluminum body** resists corrosion and wear, maintaining consistent airflow and fuel atomization even under demanding conditions, such as aggressive off-road riding or prolonged use in dusty or humid environments. The carburetor s **adjustable throttle body** allows for fine-tuning idle speed and acceleration, catering to riders who demand precise control over their ATV s power delivery. Whether tackling rough terrain, towing heavy loads, or simply enjoying spirited rides, the NJ78AU ensures a **smoother, more responsive throttle experience** without sacrificing the Big Bear s legendary durability. Ideal for both stock and modified setups, this carburetor is a trusted upgrade for enthusiasts seeking a balance of performance, longevity, and ease of maintenance. With its **sealed gaskets and precise internal components**, it minimizes fuel waste and maximizes engine efficiency, making it a standout choice for Yamaha Big Bear owners who refuse to compromise on power or reliability.

### **Pros and Cons of buying a Maxpeedingrods NJ78AU Carburetor for Yamaha Big Bear 350 YFM350FW 4x4 ATV**

1. **Performance Enhancement** The NJ78AU carburetor is designed to improve throttle response, power delivery, and overall engine performance compared to the stock carburetor. It is optimized for higher airflow, which can result in better acceleration and top-end power, especially in off-road conditions where consistent power is crucial.

2. **Durability and Build Quality** Maxpeedingrods is known for manufacturing high-quality aftermarket carburetors with precision machining and durable materials. The NJ78AU is built to withstand the demands of ATV use, including rough terrain and frequent starts.

3. **Electric Choke Compatibility** The carburetor is designed to work with an electric choke system, which is more convenient than a manual choke. This feature makes cold starts easier and reduces wear on the engine during startup.

4. **Ease of Installation** The NJ78AU is designed to be a drop-in replacement for the stock carburetor on the Yamaha Big Bear 350, meaning it can be installed without extensive modifications to the intake or throttle linkage. This makes it a straightforward upgrade for DIYers or mechanics.

5. **Fuel Efficiency and Smooth Operation** A well-tuned carburetor like the NJ78AU can improve fuel atomization, leading to better combustion and potentially improved fuel efficiency. It also reduces the likelihood of fouling or hesitation, providing a smoother ride.

6. **Aftermarket Support and Tuning Options** Maxpeedingrods offers tuning services and additional parts (such as jets and needles) to further optimize performance. This flexibility allows riders to adjust the carburetor to their specific riding style or terrain.

7. **Wider Throttle Range** The NJ78AU is designed to handle a broader throttle range, which can be beneficial for aggressive riding or towing light loads. This can make the ATV feel more responsive in both low and high RPM scenarios.

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1. **Cost** The NJ78AU carburetor is more expensive than the stock carburetor. While it offers performance benefits, the upfront cost may be a deterrent for riders on a tight budget. Additional tuning or adjustments could further increase expenses.

2. **Learning Curve for Tuning** While the carburetor is easy to install, achieving optimal performance requires proper tuning. This may involve adjusting jets, needles, or idle mixture, which can be tricky for inexperienced riders. Incorrect tuning can lead to poor performance, fuel waste, or even engine damage.

3. **Potential for Voiding Warranty** Installing an aftermarket carburetor may void the manufacturer s warranty on the ATV, especially if the engine or related components are affected by improper tuning or installation.

4. **Maintenance Requirements** Carburetors require regular cleaning and maintenance to prevent clogging or performance degradation. The NJ78AU, like any carburetor, will need periodic servicing to ensure it continues to perform optimally, which adds to long-term ownership costs.

5. **Compatibility Concerns** While the NJ78AU is designed for the Yamaha Big Bear 350, there is always a risk of minor compatibility issues, such as slight differences in throttle cable linkage or intake manifold fit. Ensuring a perfect fit may require minor modifications or adjustments.

6. **Environmental and Emissions Considerations** A performance carburetor like the NJ78AU may not meet emissions standards if the ATV is used in areas with strict regulations. However, the Yamaha Big Bear 350 is typically not subject to such restrictions for off-road use.

7. **Risk of Over-Tuning** Some riders may be tempted to push the carburetor beyond its intended limits, leading to excessive wear on the engine or other components. This can shorten the lifespan of the ATV if not managed properly.

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The Maxpeedingrods NJ78AU carburetor is a solid upgrade for the Yamaha Big Bear 350 YFM350FW 4x4 ATV, offering noticeable improvements in power, throttle response, and reliability. It is particularly well-suited for riders who prioritize performance, durability, and convenience (thanks to the electric choke). However, the upgrade requires careful tuning and maintenance to avoid potential downsides, such as increased costs or warranty voids.

For riders who are willing to invest in performance and are comfortable with some tuning, the NJ78AU is a worthwhile purchase. Those on a tight budget or who prefer minimal modifications may find the benefits outweighed by the cost. Additionally, riders who frequently ride in extreme conditions (e.g., heavy towing or aggressive off-roading) will likely see the most benefit from this upgrade.

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If you are looking to enhance the performance of your Yamaha Big Bear 350 and are prepared to invest in tuning and maintenance, the **Maxpeedingrods NJ78AU carburetor is a strong recommendation**. Pair it with professional tuning or at least thorough research into jet and needle settings to ensure optimal results.

- **Install the carburetor correctly** and ensure all related components (throttle linkage, intake manifold) are in good condition.

- **Start with conservative tuning** and adjust gradually based on performance feedback.

- **Schedule regular maintenance**, including carburetor cleaning and inspection.

- **Consider additional upgrades** (e.g., air filter, exhaust) to complement the carburetor for maximum performance.

If you are unsure about tuning or lack experience with carburetors, consult a professional mechanic who specializes in ATV performance upgrades. This will help mitigate risks and ensure the upgrade benefits you without causing unintended issues.

Details:

Introduction. For Yamaha Warrior 350 YFM350X 1987 - 2004. Compatible model's. Carburetor For Yamaha Big Bear 350 YFM350FW 4X4 4-Stroke Electric Choke ATV Most.

1.Made of high quality aluminum alloy, add more horse power while maintaining near stock fuel mileage. 2.Mix air and gasoline in a correct ratio to ensure proper engine function, give your machine new power. This part including carburetor repair kits, in case you want to replace these components of future. Manufacturer.

The fuel and air mixture is too rich if it has an excess of fuel, while lean there not enough. Quick, Simple. Choke Type:Manual. .

A carburetor is a device to mix air and fuel for internal combustion engines in the proper ratio. Package Contents. 3.Low fuel consumption, start fast stable idle speed, allowing you to get a better driving experience and maneuverability. For Yamaha Big Bear 350 YFM350U 1996 - 1998.

One against the carb, other engine. 3.Is it ready to install and fully functional right out the box?, Yes if you adjust air/fuel mixture screw. For Yamaha Big Bear 350 YFM350FW 4X4 1996 - 1998. Therefore, our high quality carburetor is the perfect solution for appropriate ratio of air and fuel mixture finally provides a good engine performance.

specifications carbthrotatv:

• for models: Yfm350fw, 350, 4x4, Bear
• for makes: Yamaha
• brand: Maxpeedingrods
• mpn: Nj78au
• air filter mount inner diameter: 1.81
• air filter mount outer diameter: 1.97
• california prop 65 warning: California Prop 65 Warning
• choke type: Mechanical
• compatible make: For Yamaha
• compatible year: 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989, 1988, 1987
• drive type: Electric Choke
• engine type: 4-stroke
• features: With E-choke
• fitment 1: For Yamaha Warrior 350 Yfm350x 1987-2004
• fitment 2: For Yamaha Big Bear 350 Yfm350fw 4x4 1996-1998
• fitment 3: For Yamaha Big Bear 350 Yfm350u 1996-1998
• fitment 4: For Yamaha Wolverine 350 Yfm350fx 4x4 1995
• fitment 5: For Yamaha Kodiak 400 Yfm400fw 4x4 1993-1998
• fitment type: Direct Replacement
• intake side inner diameter: 1.42
• intake side outer diameter: 1.57
• items included: Mounting Hardware
• machine type: Atv
• material: Aluminum
• note: No Instruction Included
• notice: This Is Aftermarket Replcement Part
• oe/oem part number: Yfm350 Carburetor, Carburetor, Carburettor, Carburetter, Carb, Carby
• placement on vehicle: Front
• quantity: 1 Piece As Show In The Picture
• type: Carburetor
• universal fitment: No

seller carbthrotatv:

• # reviews: 7954
• city: Elk Grove Village, Illinois
• rating: 99.2%

returns carbthrotatv:

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

offer carbthrotatv:

• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: March 23, 2026

general carbthrotatv:

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

payments carbthrotatv:

• wallet: Paypal
• other
• credit card: Diners-club

shipping carbthrotatv:

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

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