11 CFMOTO ZFORCE 800 Trail Problems (Easy Fixes)

The CFMOTO ZFORCE 800 is a powerful and popular utility task vehicle known for its performance and versatility. However, like any machine, it is not without its share of problems. In this article, we will discuss some common CFMOTO ZFORCE 800 trail Problems that its owners may encounter and provide detailed solutions for each problem.

11 CFMOTO ZFORCE 800 Trail Problems Solutions

Now we are going to discuss the major issues of Cfmoto Zforce 800 with their easy solutions. These are the same as Cfmoto Zforce 950 issues.

1. Unstable Idle Speed

One problem that some ZFORCE 800 owners may experience is an unstable idle speed. This can be caused by a variety of factors, including a dirty air filter, a malfunctioning fuel injector, or a faulty throttle position sensor.

Possible Causes:

  • Dirty Carburetors: The engine may not be receiving the proper fuel/air mixture due to carburetors clogged with dirt or debris.
  • Faulty Sensors: Malfunctioning sensors can also contribute to unstable idling speed.

How to Fix:

Here are steps you can take to address this issue:

Clean the Carburetors and Intake Tract:

  • Carefully clean the carburetors to ensure they are free from any blockages.
  • Inspect the intake tract for any blockages and clean it thoroughly.

Check Sensor Operation:

  • Verify that all sensors (such as the throttle position sensor) are functioning correctly.
  • If any sensor is faulty, consider replacing it.

2. Abnormal Acceleration

Another problem that may arise with the ZFORCE 800 is abnormal acceleration. A malfunctioning throttle body, a clogged fuel line, or a faulty ignition system can cause this.

Throttle Body Concerns:

The throttle body is like the gatekeeper of the engine, controlling the air that goes in for fuel injection. When it gets dirty or damaged, it can make the acceleration feel off. A good fix is to clean the throttle body to make it work better.1

Other Things to Check:

Sometimes it’s not just the throttle body causing the acceleration weirdness. Make sure the fuel system and filters are clean and doing their job. Also, check for any loose or broken parts that might be messing with how the acceleration works.

3. Poor Brake Performance

Brake problems can be a safety concern for any vehicle, including the ZFORCE 800. This issue might be due to worn brake pads, air in the brake lines, or a faulty brake master cylinder.

Solution: Keep an eye on your brake pads and replace them when needed. If you suspect air in the brake lines, bleeding the brakes can help. If the issue persists, it’s best to have a qualified technician check and possibly replace the brake master cylinder. Regular inspections and timely replacements will help maintain optimal brake performance. 

Also read Landmaster UTV  Problems

4. Engine Does Not Start

One of the most frustrating problems that ZFORCE 800 owners may face is an engine that does not start. This can be caused by a dead battery, a low level of oil, a faulty starter motor, or a malfunctioning ignition switch.

Solution: To address this issue, start by checking the battery to ensure it is properly charged. Check the oil in the engine, if it is low then fill it according to the recommended level. Replace the faulty ignition switch.

5. Bad Engine Noise

If you notice unusual or bad engine noises coming from your ZFORCE 800, it could be a sign of a more serious problem. A worn piston, a loose timing chain, or an issue with the valves can cause this.

Rod Bearing or Valve Train Issues:

  • The knocking or rattling sound you’re experiencing could be related to the rod bearings or the valve train.
  • Rod bearings connect the piston rod to the crankshaft. If they are damaged or worn, they can create abnormal noises.
  • The valve train includes components like camshafts, lifters, and valves. Any malfunction in this system can lead to noise.
  • Given that your vehicle has only covered 25 miles (250 km), it’s surprising to encounter such issues. It’s crucial to investigate further.

Possible Steps:

  • Check the Oil Filter: Inspect the oil filter for any metal flakes. If you find them, it’s a sign of internal engine wear.
  • Inspect the Clutch: The clutch system can also cause noise. Ensure it’s functioning correctly.
  • Consider Warranty Coverage: Since your CFMOTO ZForce is relatively new, it should still be under warranty. Contact your dealer to discuss the issue and explore warranty options.

Oil Pressure Sensor:

  • Another possibility is an issue with the oil pressure sensor. Low oil pressure can lead to engine noise.
  • Before tearing down the engine, consider replacing the oil pressure sensor.

6. Difficulty in Starting the Engine

Difficulty in starting the engine can be a frustrating problem for ZFORCE 800 owners. This can be caused by a weak spark plug, a clogged fuel filter, or a faulty ignition coil.


Check the spark plug, if it is weak then replace it. Clean the fuel filter, if they are dirty. If the problem persists, have a qualified technician inspect and potentially replace the ignition coil.

7. CVT Noise

Some ZFORCE 800 owners may experience noise coming from the CVT (Continuously Variable Transmission). This can be caused by worn CVT components or insufficient lubrication. The noise may originate from the rear differential (gear case).

To address this issue, you can take the following steps:

  • Check Lube Level: Ensure that the oil level in the rear differential is sufficient. Low oil levels can contribute to the noise.
  • Inspect for Metallic Fragments: Examine the old oil from the rear differential for any metallic fragments. The presence of such fragments may indicate a potential problem.
  • Pinion Movement and Backlash: Evaluate the movement and backlash of the pinion in the rear differential. An improper alignment or excessive backlash could be a source of the noise.

Regular oil changes in the rear differential are recommended as a preventive measure to mitigate noise.

Additionally, other factors like clutch wear or belt issues in the CVT system can contribute to noise. Maintaining a clean air filter and ensuring the spark plugs are in good condition is essential.

If the issue persists, seeking assistance from a professional mechanic to inspect the CVT system for specific problems is advisable. They can provide a more detailed assessment and recommend appropriate solutions based on their findings.

8. Rear-Wheel Runout

Abnormal rear-wheel runout in the CFMOTO ZForce 800 can lead to an uncomfortable ride experience. If your vehicle bounces or shakes at speeds exceeding 20 mph, it’s essential to address this issue promptly. Let’s explore the potential causes and some effective fixes:

Bent Rim:

A common culprit for abnormal wheel runout is a bent rim, often caused by encounters with potholes, rocks, or trail obstacles.

Inspect your rear wheels closely for visible signs of damage or warping.

Wheel and Tire Assembly Rotation:

  • A standard fix for this issue is to rotate the wheel and tire assembly.
  • You can rotate the assembly a certain number of stud positions on the hub or even rotate the tires 180 degrees on the wheel.
  • This helps distribute wear more evenly and may alleviate the runout problem

9. Front/Rear Suspension Too Soft/Hard

If you find that the front or rear suspension of your ZFORCE 800 is either too soft or too hard, it can impact the vehicle’s ride quality and handling. This can be caused by improper suspension settings or worn suspension components.

Solution: To address this issue, it is recommended to have a qualified technician inspect and adjust the suspension settings to the manufacturer’s specifications. If the problem persists, inspecting and potentially replacing worn suspension components may be necessary.

10. Loss of Power Steering

Loss of power steering in the CFMOTO ZForce 800 can significantly impact your riding experience. Let’s explore this issue and potential solutions:

EPS (Electric Power Steering) Failure:

  • Some ZForce 800 owners have reported issues with the EPS system.
  • Symptoms include the EPS light flashing on and off while the vehicle is running.

If you encounter this problem, consider the following steps:

Check Connections and Wiring:

  • Inspect all EPS connections for loose or damaged wiring.
  • Ensure that the motor wiring contacts are secure.
  • Sometimes, a loose connection can cause power steering problems.

ECM (Electronic Control Module) Inspection:

  • If the issue persists, it’s advisable to have the ECM checked.
  • The ECM controls various vehicle functions, including the EPS system.
  • If necessary, replace the EPS ECU to address the issue

11. Engine Overheating

Engine overheating can be a serious problem that can cause damage to the ZFORCE 800’s engine if not addressed promptly. A faulty radiator, a malfunctioning thermostat, or a clogged cooling system can cause this.

Thermal Switch in the Radiator:

  • If your ZForce 800 is overheating, it might be due to a malfunctioning thermal switch in the radiator.
  • The thermal switch controls the cooling fan, which helps regulate engine temperature.
  • If the fan isn’t working, it can lead to overheating.
  • Consider checking the thermal switch and replacing it if necessary. Since your vehicle is still under warranty, the dealer should cover this.

Quality Issues with Thermoswitches:

  • CFMOTO has reportedly changed vendors for their thermoswitches due to quality issues.
  • If you encounter overheating problems, it’s essential to address them promptly to prevent engine damage.

Other Factors:

  • Ensure there are no coolant leaks in the system.
  • Regularly inspect the radiator for any clogs or blockages.
  • Keep an eye on the temperature gauge and address any abnormal readings promptly


The CFMOTO ZFORCE 800 is a capable off-road vehicle, but it is important to be aware of the potential problems that may arise. By understanding these CFMOTO ZFORCE 800 trail problems and their solutions, its owners can ensure a smoother and more enjoyable riding experience. Regular maintenance and timely repairs are key to keeping the ZFORCE 800 in optimal condition for years to come.


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