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10 Most Common CFMOTO ZForce 800 Trail Problems- How to Fix

The CFMOTO ZFORCE 800 is a remarkable utility vehicle that can go toe-to-toe with other big-name ATVs in the industry. However, being a new player means it is still perfecting its vehicle structure and design. As a result, problems may arise from vehicle abuse, riding style, or lack of maintenance.

The most common CFMOTO ZForce 800 Trail problems include power shortage, engine overheating, starting issues, unstable idling speed, abnormal acceleration, poor brake performance, run-out of front and rear wheels, unusual noise, rear suspension issues, and power steering problems.

In this article, I will discuss the top 10 common CFMOTO ZForce 800 Trail problems and how to fix them. Keep reading to learn more about the issues you may encounter with this vehicle model and how to address them.

Basic Features of CFMOTO ZForce 800 Trail:


Type/ Value

Engine Type

V-Twin, liquid cooled, 4-stroke, SOHC, 8-valve


62 HP @ 6700 RPM



Fuel System

Delphi® EFI


2WD/4WD/4WD lock


CVTech Automatic P/R/N/H/L

Ground Clearance


Wheel Base


L x W x H

120" x 54.5" x 71.6"

Curb Weight

1,390 lbs.

Front Suspension

Independent arched dual A-arm

Rear Suspension

TTA Suspension (Dual A arm & connection rod)


Hydraulic disc


14" Cast aluminum alloy

Now, let’s jump to the potential problems associated with the CFMOTO ZForce 800 Trail and their fixes.

1. Power Shortage:

Power shortage is one of the most common issues faced by the owners of CFMOTO ZForce 800. It is an issue that can be fixed, but it requires an experienced eye to detect the main culprit.

It can be frustrating when your machine suddenly loses power or doesn’t perform up to its full capacity. But don’t worry! The solution to this problem is not always complicated.

If you're using the CFMOTO ZForce 800 Trail and have encountered a significant power loss when entering water around 1.5 feet deep, it's important to note. Even with snorkeling installed, water may still enter the clutch system, leading to power issues. While it may seem like the clutch is the main culprit behind the power loss, other factors could also be at play.

It has been observed that fuel starvation is the main issue behind power shortage, but it is not the same in all cases. Majorly, fuel problems, including the presence of thick and debris-based mixture, clogged air filters, and throttle bodies, are the main culprits behind this problem which can be fixed.

How to Fix:

Here I will discuss some guidelines which you can follow to detect the root cause in the vehicle:

  • STEP 1: Inspect the engine and clean it with a spray carb cleaner. This will help isolate the fuel problem and will help to determine that either the engine is getting a lean and rich mixture.
  • STEP 2: After this step, start the engine and check the spark plugs. You can also perform a compression test to remove the rear plugs.
  • STEP 3: There is a cap on the tank. Pulling it off and turning the key in on position is recommended. Inspect the valve of the tank for its working.
  • STEP 4: Ensure the battery is fully charged, and follow these steps to detect the issue. The engine will start after these steps, but if not, it will not receive enough spark. You can seek mechanical assistance to change the spark plugs.

2. Overheating:

Overheating is a widespread problem in all vehicles, and the CFMOTO ZForce 800 Trail is no exception. This issue arises when the vehicle is run longer without proper maintenance.

Overheating can damage the engine and its components, like the vehicle’s coolant line, radiator fan, water pump, and cooling system.

One common cause could be a malfunctioning fan. Start by checking for blown fuses and loose wires, as these can often be the culprit. If you can’t find the problem, contact your dealer for assistance.

In a reported case, the issue was identified as a faulty thermal switch in the radiator.

Another reported reason behind overheating is the high gears and towing.

When you push your CFMOTO ZForce 800 Trail to perform beyond its capacity, it can lead to overheating and damage to the clutch system of the vehicle. This can result in loud noises in the vehicle, excess oil consumption, and issues with belt wear.

Moreover, overheating can also lead to EFI problems. The electronic fuel injection (EFI) system is a vital part of the vehicle, and if it malfunctions, it can cause the engine to stall or run poorly. Overheating can damage this system, which can be expensive to repair or replace.

10 Most Common CFMOTO ZForce 800 Trail Problems- How to Fix

How to Fix:

Inspecting the engine’s components and changing the damaged parts that lead to overheating in the UTV is recommended. If there is an issue with the radiator or radiator fan, it is better to repair or replace them to deal with this overheating issue.

Here let me share some steps and guidelines which you can follow to deal with the overheating problem:



Inspection of radiator

Inspect the radiator's working and check whether there is enough coolant in it or not. Low coolant levels in the radiator can lead to overheating issues in the engine.

Recovery tank

It is recommended to install a radiator fan and a radiator cap. Besides this, it is also better to have a recovery tank to store extra coolant.

Inspection of water pump and impeller

Inspect the water pump and impeller in the vehicle. Otherwise, if you observe an unusual ticking noise in the vehicle, shut off the engine from drying out.

Driving in an ambient temperature

Drive the vehicle at an ambient temperature to avoid overheating in engine compartments.

3. Starting Issues:

Starting problems may be caused by various reasons, including low battery power and voltage, issues with the ignition circuit and ECM voltage, and low voltage reaching the coils and springs.

Some common signs and symptoms that indicate starting problems in your vehicle include difficulty starting the vehicle in both warm and cold temperatures, turning over the vehicle, and a bad fuel pump.

You can receive any of the following error codes:

Error Code



System Voltage High


TPS Circuit Low Voltage or Open


Injector 1 Circuit Malfunction


Injector 2 Circuit Malfunction


Cylinder 2 Ignition Coil Malfunction

How to Fix:

If you’re encountering starting issues with your CFMOTO ZForce 800 Trail, follow these step-by-step instructions to troubleshooting the problem:

  • Step 1: Check the kill switch – Look for any signs of water damage or corrosion in the kill switch. Water can seep in and affect the connections inside. Ensure the switch is in the proper position.
  • Step 2: Verify power to control systems – If you don’t hear the fuel pump sound when attempting to start the vehicle, it indicates a lack of power to the control systems. Proceed to check the following:
  • a. Step 2.1: Main fuse under the seat – Locate the main fuse and inspect it for any signs of damage or a blown fuse. Replace it if necessary.
  • b. Step 2.2: Fuse box by the column – Check the fuse box near the column for any blown fuses. Replace them if needed.
  • Step 3: Check for spark – To determine if there’s a spark, follow these sub-steps:
  • a. Step 3.1: Disconnect plug wire – Remove the plug wire from the rear plug.
  • b. Step 3.2: Use an alternative spark plug or screwdriver – Plug in another spark plug or a screwdriver into the plug wire socket.
  • c. Step 3.3: Crank the engine – Attempt to start the vehicle while observing the alternative spark plug or screwdriver for a spark. If you see a spark, it indicates that the ignition system is working properly.
  • Step 4: Test the CPS – If a spark exists, refer to the manual to perform an ohm-out test on the CPS (Crankshaft Position Sensor) using a multimeter. Follow the manual’s instructions carefully to ensure accurate readings.

Following these step-by-step instructions, you can diagnose and identify potential solutions for the starting issue with your CFMOTO ZForce 800 Trail. Remember to exercise caution and consult a professional if needed.

4. Unstable Idling Speed:

Many CFMOTO ZForce 800 owners have reported that the idling speed of their vehicles is unstable during or after the warm-up period or even at random times when electrical components are switched on.

The idling speed may fluctuate, resulting in poor engine performance and potential vehicle damage. The low or high performance of electrical components in the vehicle often causes this problem.

It is worth noting that idle speed issues can occur unpredictably, particularly when electrical components are turned on, or the voltage is too high.

How to Fix:

You can seek help from an automobile expert to fix the abnormal idling settings in your vehicle. It is recommended to adjust the idling speed of your vehicle between 1200 RPM to 1400 RPM at the operating temperature.

To resolve the issue of unstable idling speed in your CFMOTO ZForce 800 Trail at home, you can follow the steps I mentioned below:

  • Step 1: Open the airbox cover – Locate the airbox on your vehicle and remove the cover. This will give you access to the components underneath, including the throttle body.
  • Step 2: Locate the throttle body – Underneath the airbox, you will find the throttle body. A black plastic cover typically covers it.
  • Step 3: Remove the throttle body cover – Carefully remove the black plastic cover from the throttle body. This will expose the internal components that control the idling speed.
  • Step 4: Adjust the idle – You can access the idle adjustment mechanism with the throttle body cover removed. Use the appropriate tools, such as a screwdriver or Allen wrench, to adjust the idle setting.
  • Step 5: Test the idling speed – After making the adjustments, start the engine and observe the idling speed. Ensure that it remains stable and within the recommended range. If needed, fine-tune the idle setting until the desired stability is achieved.

5. Abnormal Acceleration:

The first reason for the abnormal acceleration in the CFMOTO ZForce 800 is a defective throttle positioning sensor.

The throttle position sensor is responsible for monitoring the position of the throttle in the engine. If faulty, it can send incorrect signals to the engine, causing the vehicle to accelerate abnormally.

Another reason for the abnormal acceleration in the CFMOTO ZForce 800 issues with the electrical components and engine compartments like fuel lines, air, and fuel filters. These components can get dirty or clogged with debris, which can cause the engine to malfunction and accelerate abnormally.

How to Fix:

You can fix the vehicle’s abnormal acceleration issue by examining faulty components like defective throttle position sensors and air and fuel filters. 

10 Most Common CFMOTO ZForce 800 Trail Problems- How to Fix

Fuel and air filters sometimes get clogged with dust and debris, leading to a poor acceleration in vehicles, so try to keep them clean to avoid this issue.

You can also refer to 13 Symptoms of Bad Throttle Position Sensor to learn more.

6. Poor Performance of Brakes:

One of the common reasons is the inappropriate levels of braking fluids. Therefore, checking the brake fluids regularly and maintaining the appropriate levels to ensure the ZForce 800 Trail brakes work effectively is essential.

Another reason for the poor performance of brakes is the prolonged usage of braking pads. Over time, braking pads wear out, resulting in a decrease in their effectiveness. Therefore, replacing the brake pads regularly is crucial to ensure that the brakes work efficiently.
10 Most Common CFMOTO ZForce 800 Trail Problems- How to Fix

How to Fix:

To address the braking issues in your CFMOTO ZForce 800 Trail, here are the steps you can take:

  • Step 1: Replace the brake master cylinder – Obtain a replacement brake master cylinder with part number 4060-080200. When installing the new master cylinder, ensure that the push rod at the top has some play. The factory tends to eliminate play, which can affect braking force.
  • Step 2: Bleed the brake system – Use a power bleeder to remove any air from the brake system. This will ensure optimal brake performance. Make sure the brake pedal feels firm after bleeding.
  • Step 3: Upgrade the brake pads – Replace the actual OEM brake pads with premium EBC FA-135X Carbon/Kevlar/Graphite pads for the left front and FA-651X for the right front. These pads offer increased braking friction, although they may not last as long in muddy or sandy conditions. For the rear, you’ll need two additional sets of FA-651X pads.
  • Step 4: Consider your riding conditions – If you prioritize brake pad life or frequently ride in mud or sand, opt for the “R” series brake pads instead.

7. Run-Out of Front and Rear Wheel:

If you have noticed sudden bouncing or shaking of your CFMOTO ZForce 800 when you exceed a specific speed (~20 mph), then it is likely that you are experiencing a wheel run-out problem.

Several factors, including wheel/tire mounting, the rim, and improper seating, can cause this issue. Even leaving your UTV in your garage for too long can cause this problem.

If you use your CFMOTO ZForce 800 Trail for commercial purposes or prolonged heavy load operation, you will likely experience this issue. The constant wear and tear can cause the wheels to become misaligned and lead to run-out problems.

How to Fix:

You can fix this issue of run-out by rotating the wheel and tires to 180 degrees on the wheel. You can also use silicone spray to fill the gap between the tire bead and wheel bead edges.

It is also recommended to inflate your tires to about 30 pounds according to the psi value.

8. Unusual Noise:

One commonly reported issue CFMOTO ZForce 800 Trail owners have reported is the production of unusual and rattling noises. If your vehicle starts making such sounds, it is recommended that you do not drive it until you can identify the noise source.

Common culprits include damaged or corroded components such as faulty connecting rods, valve trains, pressure sensors, and clogged oil filters.

The sound kind of similar to the below video illustration (although the video is for Z1000):

If you have recently rebuilt your UTV, there is also a chance that the rattling noise is due to components that have been adjusted incorrectly or not appropriately fastened.

Another cause of unusual noises in your CFMOTO ZForce 800 Trail could be the poor tuning of the EFI box. This can lead to a mess with the vehicle’s structural design and cause rattling and knocking noises.

How to Fix:

If you’re experiencing an unusual rattling noise in your CFMOTO ZForce 800 Trail, follow these steps as I mentioned below to diagnose and address the issue:

  • Step 1: Check the CVT system – Inspect the CVT system for any signs of damage, loose components, or debris. Pay close attention to the belt, pulleys, and clutch. Make sure everything is aligned correctly and secure.
  • Step 2: Inspect the exhaust system – Examine the exhaust system for any loose or damaged parts causing the noise. Check the connections, muffler, and heat shields. Tighten or replace any components as needed.
  • Step 3: Verify belt condition – Check the condition of the CVT belt. Look for signs of wear, fraying, or glazing. If the belt appears damaged or worn, consider replacing it to eliminate potential noise sources.
  • Step 4: Evaluate RPM-related noise – Pay attention to the noise level at different RPM ranges. If the noise becomes louder as the RPM increases, it may indicate an issue with the clutch or pulleys. Consult a professional technician or the CFMOTO dealership for further inspection and adjustment.
  • Step 5: Monitor for whistle noise – If you notice a whistle-like noise accompanying the rattling, it could indicate a problem with the intake or air intake system. Inspect the air filter, intake hoses, and connections for any damage or obstructions. Clean or replace the air filter as necessary.

9. Rear Suspension Issue:

This issue has been reported by many CFMOTO ZForce 800 Trail owners and is related to the suspension being too hard or too soft. The problem stems from a hole in the lower rear A-arm region, which allows oil to move toward the A-arm frame from the inner side of the bushing.

The problem is basically a fault (in terms of a hole) in the lower rear A-arms. The hole in the A-arm bushing tube causes grease to relocate from the inside bushing into the A-arm frame for all 800-class CFMOTO models. This issue is not only a cause of concern for the vehicle owners but also a design fault on the manufacturer's part.

How to Fix:

This issue has no permanent cure, but here is a quick fix. You can try to lubricate the lower A-arm. The greasing of this components is a superficial fix and prevents your UTV from damage.

10 Most Common CFMOTO ZForce 800 Trail Problems- How to Fix

The manufacturers of CFMOTO have released a statement for covering the repairing cost if a problematic lower A-arm arises in the vehicle after purchasing it.

10. Power Steering Problems:

The other significant issue that ZForce 800 Trail owners have reported is steering problems. Specifically, the EPS sensor can stop working, which becomes an issue whenever the tire strikes a hard object. When this happens, the gear shifters never return from gear, and the vehicle starts making unusual noises.

Few users have reported EPS issues with only 200 miles. The UTV steers weirdly under this situation when turning right.

This can be a significant safety issue when driving off-road, and addressing it as soon as possible is essential.

Dealerships have informed some riders that the EPS issue is partially due to a design defect. An EPS sensor gets damaged when the tire hits any hard object, causing the EPS not to function. This issue, however, can easily be corrected with an ECM replacement.

Additionally, some riders have looked at the shifter linkage as a possible cause of the steering problem. Changing the way you operate the controls can also help resolve the issue.

How to Fix:

If you’re experiencing a steering issue on your CFMOTO ZForce 800 Trail, here are some steps you can take to diagnose and address the problem:

  • STEP 1: Pay attention to your rig’s EPS (Electric Power Steering) indicator. If it’s flashing on and off while the vehicle is running, it’s a sign that something is amiss.
  • STEP 2: Next, you should shut down your rig. Give it a few moments, and then restart it. In some cases, this simple reboot can temporarily resolve the issue.
  • STEP 3: Once you’ve restarted the rig, pay close attention to the EPS system as you drive. If it works fine for a short distance and then fails again, it indicates an ongoing problem that needs to be addressed.
  • STEP 4: Take note of the mileage on your rig when the steering issue occurs. This information will be useful when discussing the problem with a professional or contacting the manufacturer for assistance.
  • STEP 5: If you’re still experiencing the steering issue after trying the above steps, contact an authorized CFMOTO dealer or a qualified mechanic. They have the expertise and tools to properly diagnose and repair the EPS system.

CFMOTO Recall:

In September 2018, CFMOTO issued a crucial safety recall affecting around 5,300 ATVs under the product name CFORCE. 

The reason? A potentially dangerous fuel hose issue that could lead to fuel leakage and a significant fire hazard. As a responsible ATV owner, staying informed about recalls like this is vital to ensure your safety and the safety of others.

The Hazard:

The heart of the matter lies in the fuel hose of the CFORCE ATVs. Over time, this hose can develop cracks, causing fuel to leak from the vehicle. 

Such leakage significantly increases the risk of a fire hazard, posing a substantial threat to both the vehicle and its riders.

Identifying the Affected ATVs:

The recall encompasses CFORCE ATVs produced between 2016 and 2018. Specifically, this includes the CFORCE 400 and CFORCE 500S from 2016-2018, as well as the CFORCE 500HO from 2017-2018. 

These ATVs are equipped with 400cc to 500cc, 4-cycle engines. 

To identify if your ATV is part of this recall, look for the logo of the "CFMOTO" on the rear and front grille and the "CFORCE" decal on the fuel tank's sides. These ATVs were sold in attractive colors such as orange, blue, red, and gray.

What to Do:

If you suspect your CFORCE ATV falls within this recall, acting promptly is crucial. For the safety of yourself and others, stop using the ATV immediately. 

Reach out to your nearest CFMOTO dealer to schedule a free repair. CFMOTO is in direct contact with all registered owners to ensure this critical safety concern is addressed without delay.

Ensuring Your Safety:

No incidents or injuries have been reported so far due to this issue. However, taking proactive steps to address the recall is essential for the safety of all ATV riders. 

As a responsible ATV owner, it’s your duty to stay informed about recalls and act accordingly to keep yourself and your community safe.

Pros and Cons of CFMOTO ZForce 800 Trail:



The powerful engine provides ample power for off-road adventures.

Some reliability concerns have been reported by users.

The UTV offers versatile usage, suitable for both recreational and utility purposes.

Limited aftermarket support may make it challenging to find specific accessories or modifications.

The responsive Electric Power Steering (EPS) system enhances control and maneuverability.

A few users have reported electrical issues with the vehicle.

The UTV provides a comfortable ride, ensuring a more enjoyable off-road experience.

Noise levels can be higher compared to some other models in its class.

The CFMOTO ZForce 800 Trail offers a competitive price point, providing value for money.

The dealer network for CFMOTO may be limited in some areas, affecting availability and service.

Users’ Feedback/Review of the FMOTO ZForce 800 Trail:

“I absolutely love my CFMOTO ZForce 800 Trail! The power of the engine is impressive, and it handles rough terrains with ease. The comfortable ride and responsive EPS make it a joy to drive. It has exceeded my expectations as a reliable and versatile off-road vehicle.”


“I’ve had some electrical issues with my CFMOTO ZForce 800 Trail. The EPS occasionally flickers and stops working intermittently. While it hasn’t affected the overall performance, it’s been an inconvenience. The dealer has been helpful in addressing the issue, but it’s something to be aware of.”


The CFMOTO ZForce 800 Trail receives mixed reviews based on user feedback. Many users appreciate its powerful engine, versatile usage, and responsive Electric Power Steering (EPS) system, which enhances off-road performance and maneuverability.

However, some users have reported reliability concerns, including occasional electrical issues and limited aftermarket support.

Final Thought:

The CFMOTO ZForce 800 Trail is a reliable, high-quality four-wheeler that can serve riders for many years if properly cared for and maintained. While riders may encounter some common problems, these issues can be easily fixed with the proper knowledge and tools.

With its utilitarian design, the CFMOTO ZForce 800 Trail is an excellent choice for both weekend trips and work purposes. But ultimately, it’s up to each individual rider to decide whether this quad is the right choice for them based on their personal experiences and preferences.

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Frequently Asked Questions (FAQs):

Is CFMOTO ZForce 800 Trail considered a suitable vehicle?

CFMOTO ZForce 800 Trail is considered an excellent solid option in the category of adventurous entry-level vehicles. This vehicle is loaded with specs that might cost you some extra. It is an overall small SUV but is much easier to tow.

Who are the manufacturers of the CFMOTO ZForce engine?

The engine of this vehicle is manufactured by Zhejiang Chunfeng power limited. They are known as CFMoto and are a known company for manufacturing engines, all-terrain vehicles, and quads.

Is CFMOTO considered a reliable vehicle?

Yes, this vehicle is considered reliable and holds an affordable price. The manufacturers never compromise on the quality of the specs of these vehicles, and they are known to last for more than twenty years if used excellently.

What is the average speed limit of a CFMOTO vehicle?

The average speed limit of CFMOTO vehicles is around 90km per hour, equal to 56mph.

Which sort of engine is present in the CFMOTO vehicles?

These vehicles hold a V-Twin engine of KTM LC8.

Which ATV is considered the most powerful one among CFMOTO?

The most powerful ATV in the CFMOTO category is CFORCE 1000 EPS. It is a vehicle loaded with the specs of a V-twin engine of 963cc engine power producing 74 horsepower.