The 5 CFMOTO CFORCE 400 Problems and Their Fixes

The CFMOTO CFORCE 400 has gained popularity in the market for its rugged performance and affordable price tag. Boasting a blend of versatility, functionality, and adventure, it has captured the attention of riders seeking a thrilling experience on various terrains. However, like any mechanical marvel, the CFMOTO CFORCE 400 is not without its share of challenges.

In this comprehensive analysis, we delve into the world of the CFMOTO CFORCE 400 and explore some of the most prevalent problems reported by owners and users. While it is true that numerous enthusiasts have enjoyed a seamless ride with this ATV, it is essential to shed light on the issues that may arise during ownership.

But first, let’s acquaint ourselves with the specifications and features that make the CFMOTO CFORCE 400 stand out in the ATV market.

CFMOTO CFORCE 400 Specs and Features


The CFORCE 400 is powered by a 400cc, single-cylinder, liquid-cooled engine. This engine provides enough displacement to generate ample horsepower and torque, ensuring that the CFORCE 400 can tackle various obstacles and inclines with ease. Furthermore, the CFORCE 400’s engine is engineered to prioritize reliability and longevity.

Fuel System

The CFORCE 400 features an electronic fuel injection (EFI) system, which optimizes fuel efficiency and enhances throttle response. This technology ensures smooth power delivery while minimizing emissions.


The CFMOTO CFORCE 400 comes with a capable and versatile drivetrain that allows riders to adapt to various off-road conditions and maximize traction. The ATV offers selectable 2WD/4WD modes, allowing riders to adapt to different riding conditions. It also includes a differential lock, which enhances traction on demanding terrains, such as mud or slippery surfaces.


The CFMOTO CFORCE 400 is equipped with a smooth and efficient transmission system designed to enhance the ATV’s performance and provide a seamless riding experience. It features a CVTech Automatic transmission with P/R/N/H/L gearing. And with a belt drive system, the CFORCE 400 is designed for efficient power transfer and reliable performance.


The CFORCE 400 is equipped with independent double A-arm suspension on the front and rear. This system, combined with adjustable shocks, ensures excellent shock absorption, improved stability, and enhanced maneuverability.

Ground Clearance

The CFORCE 400 offers an impressive ground clearance of 9.8 inches. This enables riders to navigate over obstacles with ease, reducing the risk of getting stuck or damaging the ATV’s undercarriage.

Cargo Capacity

The CFMOTO CFORCE 400 offers both front (75 lbs.) and rear (100 lbs.) cargo racks, providing ample storage space for gear and equipment during off-road adventures. The racks are sturdy and durable, allowing riders to carry items of various sizes and weights securely.

Controls and Ergonomics

The CFORCE 400 is designed with user-friendly controls and ergonomic features for enhanced comfort and convenience. It includes a digital instrument cluster that provides vital information at a glance, a responsive throttle, and hydraulic disc brakes for reliable stopping power.

Design and Durability

The CFORCE 400 boasts a robust design, utilizing durable materials and protective elements. The ATV has undergone rigorous testing to ensure its ability to withstand the demands of any off-road terrain. Furthermore, CFMOTO provides warranty coverage and comprehensive customer support, further emphasizing its commitment to the CFORCE 400’s durability. When properly maintained and cared for, the CFORCE 400 is built to last and provide riders with a dependable off-road experience.

CFMOTO 400 Top Speed

CFMOTO has designed the CFORCE 400 to provide a balance of power, control, and speed, ensuring an enjoyable off-road experience. On average, it has a top speed of 50-55 miles per hour. However, it is important to note that this speed range can vary depending on various factors such as rider weight, terrain conditions, and payload. Additionally, it’s important to ride responsibly and adhere to local regulations when reaching high speeds.

CFMOTO CFORCE 400 Problems

CFMOTO CFORCE 400 Problems

While there have been many positive CFMOTO CCFORCE reviews, it’s also true that many owners have had issues with the vehicle. In the following section, we present a comprehensive overview of the most common CFMOTO CFORCE 400 issues and provide expert recommendations to prevent or resolve them.

Read on!


Overheating is a common issue that some CFORCE 400 owners have experienced, particularly in situations where the ATV is subjected to extreme riding conditions or when carrying heavy loads for an extended period.

Overheating can occur if there is insufficient airflow around the engine and radiator. Other factors, such as clogged or dirty air filters, debris blocking the radiator, or riding in muddy conditions can also impede the cooling system’s effectiveness.

What’s more, operating the CFORCE 400 in extremely high ambient temperatures can strain the engine’s cooling system, leading to overheating. Also, if you frequently ride in rough, hilly, or muddy terrain that demands significant power from the engine, it can generate more heat and put a strain on the cooling system.


To prevent overheating in your CFMOTO CFORCE 400 ATV, you’ll need to regularly check the coolant level in the radiator and ensure it is at the recommended level. If it’s low, top it up with the appropriate amount of coolant.

Also, ensure that the radiator fan is functioning correctly. Inspect the radiator and cooling fins for any dirt, debris, or mud buildup. If they are dirty or soiled, you can clean them using compressed air or a soft brush to facilitate proper airflow and cooling.

Always be cautious when towing trailers or carrying heavy cargo on your CFORCE 400. The additional weight can place extra stress on the engine, generating more heat. If necessary, distribute the load evenly and within the recommended limits.

Poor throttle response

Many CFMOTO CFORCE 400 ATV owners have reported experiencing poor throttle response issues with their vehicles. This problem is characterized by a delay or unresponsiveness when the throttle is applied, resulting in a sluggish or delayed acceleration. Several factors can contribute to this problem, requiring attention and troubleshooting.

One common cause is air intake issues. If the air filter becomes clogged with dirt or debris, it can restrict the airflow into the engine, leading to poor throttle response. Fuel delivery problems can also affect throttle response. For instance, a clogged fuel filter or a malfunctioning fuel pump can result in insufficient fuel reaching the engine, causing sluggish acceleration.

Throttle cable adjustment is another aspect to consider. If the throttle cable is improperly adjusted—either too loose or too tight—it can affect the throttle response. Issues with the carburetor can also lead to poor throttle response. For example, a dirty carburetor or a clogged jet can disrupt the fuel-air mixture, which might result in sluggish acceleration.


Addressing poor throttle response in the CFMOTO CFORCE 400 may require a combination of cleaning, replacing, or adjusting various components. First, inspect and address any air intake issues. Check the air filter and clean or replace it if it is dirty or clogged. A clean air filter ensures proper airflow and can significantly improve throttle response.

Next, focus on the fuel delivery system. Start by inspecting the fuel filter for clogs or contaminants. If it is dirty or obstructed, replace it to ensure a consistent fuel flow. Additionally, verify the operation of the fuel pump.

Throttle cable adjustment is another crucial step. Ensure that the throttle cable is properly adjusted, neither too loose nor too tight. An incorrectly adjusted cable can result in a sluggish throttle response. Consult the owner’s manual for the specific adjustment procedure and follow it precisely.

If the above steps do not resolve the issue, consider checking and cleaning the carburetor. A dirty carburetor or clogged jets can disrupt the fuel-air mixture, leading to poor throttle response. Use an appropriate carburetor cleaner and follow the laid-down instructions to clean it thoroughly.

Vapor lock stalling problems

Some CFMOTO CFORCE 400 ATV owners have also reported experiencing vapor lock and stalling issues with their vehicles, particularly in hot weather conditions. Vapor lock occurs when the fuel in the fuel lines or carburetor evaporates too quickly, leading to a disruption in fuel flow and subsequent engine stall. This issue can be frustrating and inconvenient for ATV owners, especially during extended rides or in areas with high ambient temperatures.

The CFMOTO CFORCE 400, like many other ATVs, is susceptible to vapor lock due to its design and the proximity of the fuel system components to heat sources. The problem typically arises when the engine and surrounding components generate significant heat, causing the fuel to reach its boiling point. This heat transfer can occur due to various factors, such as inadequate insulation, insufficient ventilation, or proximity to hot engine parts.

Vapor lock can result in sudden engine stalling, leaving ATV riders stranded until the fuel system cools down and the vaporized fuel reverts to its liquid state. This issue can be particularly prevalent during prolonged idling or slow-speed operation, as the reduced airflow contributes to higher heat levels in the engine compartment.


Addressing vapor lock and stalling issues in the CFMOTO CFORCE 400 requires implementing various preventive measures. First, insulate the fuel lines with heat-resistant materials to minimize heat transfer and reduce the chances of fuel vaporizing. This helps maintain a lower temperature in the fuel lines, preventing vapor lock.

Next, relocate any heat sources near the fuel lines or carburetor, if possible. By moving these sources away from the fuel system components, you can reduce the risk of heat-induced vapor lock. Also, ensure proper venting of the fuel system to prevent a vacuum from forming. Check that the fuel tank and venting components are clear and functioning correctly to allow air to replace the fuel consumed by the engine.

Consider upgrading the stock mechanical fuel pump to an electric fuel pump. Electric fuel pumps generate less heat and are less prone to causing vapor lock. Consult a qualified mechanic or CFMOTO dealer to ensure compatibility and proper installation.

Finally, maintain an adequate fuel level by keeping the tank at least half full whenever possible. This reduces the amount of air space above the fuel, minimizing the chances of fuel vaporization. Also, monitor operating conditions, especially in hot weather. In addition, consider adjusting your riding style to increase airflow and dissipate heat from the engine and fuel system.

Exhaust system overheating

Excessive heat from the exhaust is a known issue that some CFMOTO CFORCE 400 ATV owners have encountered. This problem occurs when the heat generated by the exhaust system is not effectively managed or contained.

Excessive heat can pose several challenges for ATV owners. The proximity of the exhaust system to the rider’s legs and feet can result in discomfort, especially during longer rides or in hot weather conditions. Additionally, the heat transferred to surrounding components can lead to damage, such as melted wiring, deformed plastics, or reduced performance if critical parts are affected.


To address the excessive heat from the exhaust, consider installing additional heat shielding around the exhaust system to minimize heat transfer to surrounding components. You can use thermal wraps, heat-resistant tapes, or heat shields made of metal or other insulating materials.

In addition, consider upgrading to an aftermarket exhaust system specifically designed to reduce heat emissions. Look for exhaust systems that offer improved heat management and thermal insulation. Also, ensure the exhaust system is properly maintained by regularly inspecting for any damaged or worn-out components.

Enhance the ventilation and airflow around the exhaust system by ensuring that any heat shields or coverings do not impede the natural cooling process. Additionally, consider removing any obstructions or debris from the exhaust system to maintain optimum airflow and prevent heat buildup.

Suspension and ride quality issues

Some riders have reported various concerns related to the suspension and ride quality of the CFMOTO CFORCE 400 ATV. Some have found the suspension to be overly stiff, resulting in a harsh and uncomfortable ride, particularly when traversing rough terrain.

Others have encountered limitations in the suspension travel, causing the ATV to bottom out or hit the end of its travel when encountering larger bumps or obstacles. These issues can result in a less-controlled ride, reduced traction, and damage to the ATV.

The stock suspension on the CFMOTO CFORCE 400 may also lack the desired adjustability, restricting owners from fine-tuning the system to their specific preferences and riding conditions. This limitation can further contribute to suboptimal ride quality and handling.


Proper maintenance of the suspension system is crucial for optimal performance. Regularly inspect and lubricate suspension components, check for any signs of wear or damage, and replace worn-out parts as needed. Additionally, maintaining proper air pressure in the tires is also essential for optimal ride quality.

Consider upgrading the suspension components, such as shocks or springs, to aftermarket options that offer improved performance and adjustability. High-grade suspension components can provide better dampening, increased travel, and enhanced control over various terrains.

Adjusting your riding technique can also help mitigate suspension-related issues. Use proper body positioning, distribute your weight effectively, and maintain an appropriate speed when encountering rough terrain or obstacles. These techniques can help reduce the impact on the suspension and improve overall ride quality.


While the CFMOTO CFORCE 400 ATV is generally reliable, it can be prone to certain issues that can impact its performance. However, the good news is that many of these problems can be easily diagnosed and resolved. By following the solutions discussed above or seeking assistance from a local mechanic, you can effectively address these issues and restore your ATV’s functionality. That said, it is important to prioritize regular maintenance to ensure a trouble-free riding experience.

Leave a Comment