Written By Doug Smirnoff

BESV TRX 1.1 LS Common Problems and Troubleshooting

The BESV TRX 1.1 LS is an exceptional electric bike designed to tackle the most challenging trails. With features like a Shimano EP6 motor delivering 85 Nm of torque, reliable Shimano hydraulic disc brakes (MT420/MT410), and a 720 Wh battery for extended rides, it’s a top-of-the-line hardtail eMTB. This article addresses common problems and troubleshooting tips for the BESV TRX 1.1 LS.

BESV TRX 1.1 LS Overview

The BESV TRX 1.1 LS is a hardtail eMTB built to conquer rugged terrain. Here are some key details:

FrameHard-tail BESV TRX Series alloy frame, Shimano Steps and internal battery compatible
Color(s)Trail khaki with night black
SizesXS (43cm), S (47cm), M (52cm), L (56cm)

Key Features:

  • Shimano EP600 center-motor, 250W rated power, 85Nm of torque, 25km/h maximum assist
  • 720 Wh integrated Lithium Ion battery with Smart 4-5.6A charger
  • Shimano SC-E5003 display with LCD display
  • Shimano Deore RD-M6100, 12-speed rear derailleur

Causes of Common Problems with the BESV TRX 1.1 LS

This section will explore potential issues that users may encounter with the BESV TRX 1.1 LS electric bike and provide troubleshooting solutions.

Common Problems with BESV TRX 1.1 LS

1. Battery Not Charging

Description: The BESV TRX 1.1 LS battery is not charging, and the bike won’t power up.

Cause: This issue can occur due to a variety of reasons, including a faulty charger, loose connections, or battery damage.


  1. Check the charger connection to ensure it’s properly plugged into both the wall outlet and the bike’s charging port.
  2. Inspect the charger for any visible damage or loose components. Replace if necessary.
  3. If the charger seems fine, try charging the bike with a different power outlet to rule out electrical issues.
  4. If the problem persists, contact BESV customer support for further assistance.

2. Motor Not Providing Assistance

Description: The motor on your BESV TRX 1.1 LS is not providing the expected pedal-assist while riding.

Cause: This can be due to motor controller issues, sensor malfunctions, or a drained battery.


  1. Ensure the battery is sufficiently charged. A low battery may result in reduced motor performance.
  2. Inspect the motor cables and connections for any loose or damaged wires. Reconnect or replace as needed.
  3. Check the pedal-assist sensor to make sure it’s properly aligned and functioning. Clean any dirt or debris that may be affecting it.
  4. If the problem persists, consult the user manual for motor diagnostics or contact a certified BESV service center.

3. Brakes Squeaking or Grinding

Description: You hear squeaking or grinding noises when applying the brakes on your BESV TRX 1.1 LS.

Cause: Brake squeaking or grinding can occur due to contamination, worn brake pads, or misalignment.


  1. Inspect the brake pads for wear. If they are thin or damaged, replace them with compatible brake pads.
  2. Clean the brake rotors and pads to remove any debris or contaminants that may be causing noise.
  3. Check the brake caliper alignment. Ensure it’s centered and not rubbing against the rotor. Adjust if necessary.
  4. If the noise persists, consider consulting a professional bike mechanic for a thorough brake system inspection.

4. Display Malfunction

Description: The display screen on your BESV TRX 1.1 LS is not functioning correctly, displaying error messages or no information at all.

Cause: Display issues can result from loose connections, software glitches, or component damage.


  1. Check the display connections to ensure they are securely attached to the bike’s control unit.
  2. Try resetting the display by following the instructions in the user manual.
  3. If the problem persists, contact BESV customer support for guidance on potential software updates or replacement parts.

5. Chain Skipping Gears

Description: The chain on your BESV TRX 1.1 LS occasionally skips gears, making gear shifting unreliable.

Cause: Chain skipping can occur due to misadjusted derailleurs, a worn chain, or a bent derailleur hanger.


  1. Inspect the chain for signs of wear or damage. Replace it if necessary.
  2. Check the derailleur alignment and cable tension. Make adjustments as needed to ensure smooth gear shifts.
  3. Examine the derailleur hanger for any bends or damage. If found, replace it to improve gear shifting reliability.
  4. If the issue persists, consult the user manual for further derailleur adjustment instructions or seek assistance from a bike mechanic.

6. Excessive Chain Slap

Description: The chain consistently slaps against the chainstay during rides, creating an annoying noise.

Cause: Chain slap can occur due to loose chain tension, inadequate chainstay protection, or worn chain components.


  1. Check and adjust the chain tension to ensure it’s within the manufacturer’s recommended specifications.
  2. Add chainstay protectors or wraps to reduce the noise and prevent potential frame damage.
  3. If the chain is excessively worn, replace it along with the cassette and chainring if needed.

7. Unresponsive Electric Assist

Description: The electric assist on your BESV TRX 1.1 LS intermittently becomes unresponsive during rides.

Cause: This issue may stem from loose electrical connections, overheating components, or software glitches.


  1. Inspect all electrical connections, including motor and battery connections, to ensure they are secure.
  2. Allow the electric components to cool down if they have been operating continuously. Overheating can cause temporary loss of function.
  3. Try resetting the electric assist system as per the user manual’s instructions.

8. Frequent Tire Flats

Description: You experience frequent flat tires on your BESV TRX 1.1 LS, disrupting your rides.

Cause: Frequent flats may result from riding in rough terrain, insufficient tire pressure, or punctures from debris.


  1. Ensure your tires are properly inflated to the recommended pressure to minimize the risk of pinch flats.
  2. Inspect your tires regularly for sharp objects embedded in the tread and remove them promptly.
  3. Consider using tubeless tire setups or puncture-resistant tire liners to reduce the frequency of flats in rugged terrain.

9. Unusual Noises from the Motor

Description: You notice unusual clicking or grinding noises coming from the motor area while riding your BESV TRX 1.1 LS.

Cause: Motor noises can be caused by loose components, dirt or debris, or internal motor issues.


  1. Inspect the motor area for loose bolts or components and tighten them if necessary.
  2. Clean the motor area to remove any dirt or debris that might be causing the noises.
  3. If the noises persist, consult a certified BESV service center for a more in-depth motor inspection.

10. Inconsistent Battery Range

Description: The battery range on your BESV TRX 1.1 LS varies significantly, making it challenging to plan long rides.

Cause: Inconsistent battery range can be influenced by factors like terrain, riding style, and battery health.


  1. Adjust your riding style to be more energy-efficient, such as using lower assistance levels on flat terrain.
  2. Regularly maintain and condition the battery according to the manufacturer’s recommendations.
  3. Keep in mind that factors like temperature and wind resistance can affect battery range, so plan your rides accordingly.

11. Excessive Chain Wear

Description: The chain on your BESV TRX 1.1 LS appears to wear out quickly, even with regular maintenance.

Cause: Excessive chain wear can result from riding in harsh conditions, poor lubrication, or misalignment.


  1. Regularly clean and lubricate the chain according to the manufacturer’s recommendations.
  2. Check for chain misalignment or issues with the chainring and cassette that may accelerate wear.
  3. Consider using a higher-quality, longer-lasting chain to reduce the frequency of replacements.

12. Loose Handlebars or Stem

Description: You notice that the handlebars or stem of your BESV TRX 1.1 LS become loose during rides.

Cause: Loose handlebars or stem can occur due to inadequate tightening or vibrations from rough terrain.


  1. Regularly inspect and ensure that all handlebar and stem bolts are properly tightened to the recommended torque specifications.
  2. Consider using a torque wrench to ensure precise tightening.
  3. Apply a suitable thread locker to bolts to prevent them from loosening due to vibrations.

13. Display Error Codes

Description: Your BESV TRX 1.1 LS display shows error codes that you’re not familiar with, affecting your riding experience.

Cause: Display error codes can be indicative of various system malfunctions or software issues.


  1. Refer to the user manual to decode the specific error code displayed on the screen.
  2. Try resetting the display or the entire electric system following the manufacturer’s instructions.
  3. If the error persists, contact BESV customer support and provide them with the error code for further assistance.

14. Unresponsive Brakes

Description: The brakes on your BESV TRX 1.1 LS feel unresponsive or less effective, compromising your safety.

Cause: Unresponsive brakes can be due to brake pad contamination, air in the brake lines, or worn brake components.


  1. Inspect the brake pads for contamination or wear. Clean or replace them as needed.
  2. Bleed the brake lines to remove air bubbles, which can improve brake responsiveness.
  3. Check the brake caliper alignment and ensure it’s centered on the rotor for optimal braking performance.

15. Uneven Suspension Performance

Description: The suspension on your BESV TRX 1.1 LS doesn’t feel balanced, leading to an uncomfortable ride.

Cause: Uneven suspension performance can result from incorrect settings, worn suspension components, or improper maintenance.


  1. Check and adjust the suspension settings according to your weight, riding style, and terrain to ensure balanced performance.
  2. Inspect the suspension fork and rear shock for signs of wear, and replace worn components as needed.
  3. Perform regular maintenance on the suspension components, including cleaning and lubrication.

16. Uneven Tire Wear

Description: Your BESV TRX 1.1 LS tires show uneven wear patterns, reducing traction and stability.

Cause: Uneven tire wear can be caused by misalignment, incorrect tire pressure, or rough riding conditions.


  1. Regularly check and adjust tire pressure to the manufacturer’s recommended levels to ensure even wear.
  2. Inspect the tires for signs of misalignment. If misaligned, realign them to prevent further uneven wear.
  3. Avoid riding in excessively rough terrain that can accelerate tire wear, and consider using tires suited for specific conditions.

17. Chain Dropping Off Chainring

Description: The chain frequently drops off the chainring on your BESV TRX 1.1 LS, causing disruptions during rides.

Cause: Chain dropping can occur due to poor chain tension, misadjusted front derailleurs, or chainring wear.


  1. Check and adjust the front derailleur to ensure proper alignment and clearance with the chainring.
  2. Inspect the chain for wear, and replace it if it’s stretched or damaged.
  3. Ensure the chain tension is appropriate for the gear you’re using to reduce the risk of dropping.

18. Pedal Noise and Wobble

Description: You experience noise and wobbling sensations coming from the pedals of your BESV TRX 1.1 LS while pedaling.

Cause: Pedal noise and wobbling can result from loose pedal attachments, worn bearings, or uneven pedal pressure.


  1. Inspect and tighten the pedal attachments to the crank arms to ensure they are secure.
  2. Examine the pedal bearings for wear and replace them if they show signs of damage.
  3. Practice smooth and even pedal strokes to reduce wobbling sensations during rides.

19. Handlebar Vibration

Description: The handlebars of your BESV TRX 1.1 LS vibrate excessively, causing discomfort during rides.

Cause: Handlebar vibration can be due to uneven terrain, loose components, or improperly balanced wheels.


  1. Check the tightness of handlebar grips and controls to ensure they are securely fastened.
  2. Inspect the wheels for proper balance, and balance them if necessary to reduce vibrations.
  3. Consider using handlebar dampeners or padded gloves to minimize discomfort caused by vibration.

20. Inconsistent Gear Shifting

Description: Your BESV TRX 1.1 LS experiences inconsistent gear shifting, making it challenging to maintain a smooth ride.

Cause: Inconsistent gear shifting can result from cable tension issues, misaligned derailleurs, or worn drivetrain components.


  1. Inspect and adjust the cable tension for precise gear shifting. Follow the manufacturer’s guidelines for adjustments.
  2. Check the alignment of front and rear derailleurs, and make necessary adjustments to ensure they operate smoothly.
  3. Examine the drivetrain components for wear, particularly the cassette and chainrings, and replace them if needed.

21. Excessive Chain Noise

Description: Your BESV TRX 1.1 LS produces excessive noise from the chain, affecting the overall riding experience.

Cause: Excessive chain noise can be due to poor lubrication, chain misalignment, or worn drivetrain components.


  1. Ensure the chain is adequately lubricated with a suitable chain lubricant to reduce friction and noise.
  2. Check for chain misalignment or issues with the chainring and cassette that may be contributing to the noise.
  3. Inspect and replace worn chain components as needed to improve overall chain performance.

22. Handlebar Grip Slippage

Description: The handlebar grips on your BESV TRX 1.1 LS tend to slip during rides, leading to discomfort and reduced control.

Cause: Handlebar grip slippage can occur due to worn grips, inadequate grip adhesion, or excessive moisture.


  1. Replace worn handlebar grips with new ones to ensure a secure and comfortable grip.
  2. Check if the grips are properly installed and seated on the handlebars. Adjust as necessary.
  3. Consider using grip-enhancing products like grip glue or handlebar tape to improve grip adhesion.

23. Seatpost Dropping During Rides

Description: The seatpost on your BESV TRX 1.1 LS occasionally drops down while riding, causing discomfort and potential safety concerns.

Cause: Seatpost dropping can result from loose seatpost clamps, a poorly adjusted seatpost, or worn seatpost components.


  1. Inspect and tighten the seatpost clamp to the recommended torque specifications to prevent unintended movement.
  2. Adjust the seatpost height and ensure it’s correctly inserted into the frame to minimize the risk of dropping.
  3. If the issue persists, consider upgrading to a more secure seatpost clamp or seeking professional assistance.

24. Sudden Loss of Electric Power

Description: Your BESV TRX 1.1 LS experiences sudden and unexpected power loss, leaving you without electric assistance.

Cause: Sudden power loss can be due to electrical connectivity issues, overheating, or software glitches.


  1. Check all electrical connections, including battery and motor connections, to ensure they are secure and free of damage.
  2. Avoid extended periods of maximum power output to prevent overheating of electrical components.
  3. Attempt to power cycle the electric system by turning it off and on, following the manufacturer’s guidelines.

25. Loose or Noisy Pedals

Description: The pedals on your BESV TRX 1.1 LS feel loose or produce unusual noises, affecting pedal efficiency.

Cause: Loose or noisy pedals can result from inadequate pedal tightening, worn pedal bearings, or contamination.


  1. Check and tighten the pedal attachments to the crank arms to ensure they are secure.
  2. Inspect the pedal bearings for wear or damage, and replace them if necessary.
  3. Clean and lubricate the pedal threads and bearings to reduce noise and improve pedal efficiency.

BESV TRX 1.1 LS Electric Bike User Reviews

When considering a purchase as significant as an electric bike, it’s essential to gather insights from fellow riders. We’ve compiled user reviews of the BESV TRX 1.1 LS Electric Bike to provide you with a comprehensive overview of what real users have experienced. Please note that all user feedback mentioned here is sourced from reviews available on Walmart.com.

Positive Reviews from BESV TRX 1.1 LS Electric Bike Users

  • Many users were satisfied with the overall performance of the BESV TRX 1.1 LS Electric Bike, praising its powerful Shimano motor and torque for conquering challenging terrains.
  • Some riders appreciated the long-lasting battery, providing excellent range for extended off-road adventures.
  • Several users found the Shimano hydraulic disc brakes (MT420/MT410) to offer reliable and precise stopping power, enhancing safety during rides.
  • The design and build quality of the bike, including its hard-tail BESV TRX Series alloy frame, received positive feedback for durability and aesthetics.
  • Users mentioned that the BESV TRX 1.1 LS Electric Bike provides a comfortable and stable ride experience, thanks to its suspension system and well-designed components.

In summary, BESV TRX 1.1 LS Electric Bike users generally reported positive experiences. They highlighted the bike’s impressive motor, long-lasting battery, reliable brakes, sturdy construction, and comfortable ride. These reviews reflect satisfaction with the bike’s performance and design.

Negative User Reviews of the BESV TRX 1.1 LS Electric Bike

  • Some users were not satisfied with the weight of the BESV TRX 1.1 LS, finding it relatively heavy and challenging to handle, especially in certain riding situations.
  • A few riders reported issues with the bike’s motor, citing occasional malfunctions and reduced pedal-assist performance.
  • Several users mentioned that while the battery provided good range, the charging process was relatively slow, leading to longer downtime between rides.
  • Some individuals experienced discomfort with the bike’s saddle, prompting them to seek alternative options for improved ergonomics.
  • A minority of users encountered difficulties with gear shifting, stating that the transmission system occasionally experienced hiccups during rides.

While many users expressed satisfaction, there were some negative feedback points to consider. These included concerns about the bike’s weight, occasional motor issues, charging speed, saddle comfort, and gear shifting. It’s important to weigh both positive and negative aspects to make an informed decision.

The majority of users who shared their experiences with the BESV TRX 1.1 LS Electric Bike on Walmart.com reported positive feedback, highlighting its performance, range, and build quality. However, as with any product, individual preferences and experiences may vary, so it’s advisable to consider both positive and negative reviews when making your purchase decision.

BESV TRX 1.1 LS Electric Bike Manual

If you are looking for the operating instructions and user manual for the BESV TRX 1.1 LS Electric Bike, you can find them on the manufacturer’s website. Visit the official BESV website and navigate to the support or downloads section to access the comprehensive manual for your electric bike. The manual contains essential information on bike setup, maintenance, and troubleshooting, ensuring you have the necessary guidance for a smooth riding experience.

Frequently Asked Questions

1. How do I maintain the battery of my BESV TRX 1.1 LS Electric Bike?

To maintain the battery, follow the manufacturer’s recommendations provided in the user manual. Generally, it’s essential to keep the battery charged regularly, avoid extreme temperatures, and store it in a cool, dry place when not in use. Regularly inspect and clean the battery contacts for optimal performance.

2. What should I do if my electric assist suddenly stops working?

If you experience a sudden loss of electric assist, first, check the battery charge and connections. Make sure the battery is adequately charged and securely connected. If the issue persists, consult the troubleshooting section of your user manual for step-by-step guidance on resolving electric assist problems.

3. How can I troubleshoot gear shifting issues on my BESV TRX 1.1 LS?

If you encounter gear shifting problems, begin by checking the cable tension and derailleur alignment. Ensure that the chain is clean and properly lubricated. If the issue continues, refer to the troubleshooting section in the user manual for detailed instructions on diagnosing and fixing gear shifting issues.

4. Is there a recommended maintenance schedule for my BESV TRX 1.1 LS?

Yes, the user manual provides a recommended maintenance schedule. It typically includes tasks like cleaning and lubricating the chain, inspecting brakes, and checking tire pressure. Following this schedule will help keep your electric bike in optimal condition and extend its lifespan.

5. What should I do if I encounter unusual noises coming from my BESV TRX 1.1 LS Electric Bike?

If you hear unusual noises while riding, inspect your bike for loose components, dirt, or debris that may be causing the noise. Tighten any loose bolts and clean the affected areas. If the issue persists, consult the user manual for specific guidance on addressing unusual noises.


When faced with any problems or questions regarding your BESV TRX 1.1 LS Electric Bike, it’s advisable to refer to the user manual, contact customer service, or visit an authorized service center. The manual provides detailed instructions for maintenance and troubleshooting, while customer service and service centers can offer expert assistance to resolve any issues you may encounter. Always prioritize safety and the correct maintenance of your electric bike for a reliable and enjoyable riding experience.

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