Written By Doug Smirnoff

BPM R-750Z Common Problems and Troubleshooting

If you own a BPM R-750Z Electric Bike, you may encounter common problems during your rides. In this article, we will explore these issues and provide troubleshooting solutions specific to this model. Whether you’re navigating challenging terrains or dealing with battery concerns, we’ve got you covered with expert guidance.

BPM R-750Z Overview

The BPM R-750Z is a versatile electric bike designed for various outdoor adventures. Here’s a brief overview of this remarkable electric bike:

Product DetailsFeatures
Rickshaw Fat Tire Electric Tricycle With Rear SeatFully Loaded Edition
R-750X Rickshaw TricycleFull Electric Range: Up to 51 Miles
HEAVY DUTY FAT TIREPedal Assist Range: Up to 57 Miles
750W 48V 21AH Samsung BatteryRickshaw weight: 110 pounds

Product Details

  • Adjustable Seat: perfect for any size rider.
  • Maximum Rider Weight: 400lbs
  • Designed for All Terrains


  • Battery: 48V*21AH Samsung Lithium Ion
  • Charge Time: 4-6 Hours
  • Battery Life Est: 1000 Charges
  • Motor: BaFang 750W Front Drive
  • Motor Power< Fixed Output Power: 750W
  • 5 Power Levels
  • Quick Charger: US 110v Standard Smart Charger
  • Throttle Type: Variable Speed Control – 1/2 Thumb Throttle

Hardware Details

  • Frame: Aluminium-Alloy – heavy duty for off-roading
  • Fork: Steel Tig Welding
  • Handlebar: Aluminum
  • Seat Post: Aluminum
  • Saddle Seat: Leather
  • Chain: Rust Resistant Chain
  • Pedals: Aluminum
  • Tire Front: Kenda 24” X 4.0” Fat Tire
  • Tire Back: Kenda 20” X 4.0” Fat Tire
  • Brakes: Alloy Aluminum Front and Rear Disc
  • Headlight: LED

Causes of Common Problems with the BPM R-750Z

Before diving into specific problems and their solutions, let’s briefly introduce the common issues you might encounter with the BPM R-750Z Electric Bike. In the following sections, we’ll provide detailed troubleshooting guidance for each of these problems.

Common Problems with the BPM R-750Z

1. Battery Not Charging

Description: One of the most common issues with the BPM R-750Z is when the battery fails to charge, leading to a bike that won’t operate.

Cause of the Problem: This problem can occur due to a faulty charger, a loose connection, or issues with the battery itself.


  1. First, ensure that the charger is securely plugged into a functioning power outlet.
  2. Check for any loose connections between the charger and the bike’s battery port.
  3. If the charger and connections are fine, the battery might be the issue. Contact customer support for a battery replacement.

2. Loss of Power During Rides

Description: Some BPM R-750Z owners experience sudden power loss while riding, which can be frustrating and potentially dangerous.

Cause of the Problem: This issue can result from various factors, including overheating, a malfunctioning motor, or an exhausted battery.


  1. Allow the bike to cool down if it has been used extensively. Overheating can lead to power loss. Consider shorter rides in high-temperature conditions.
  2. If the problem persists, check the motor for any visible damage or unusual noises. A damaged motor may need replacement or repair.
  3. Ensure that the battery is adequately charged before each ride. Low battery levels can cause power loss. Invest in a reliable battery monitor.

3. Inconsistent Pedal Assist

Description: Some users report that the pedal assist feature on the BPM R-750Z doesn’t always work as expected, leading to inconsistent support during pedaling.

Cause of the Problem: Inconsistent pedal assist can occur due to sensor issues, wiring problems, or a malfunctioning controller.


  1. Check the pedal assist sensors for dirt or damage. Clean or replace them as needed.
  2. Inspect the wiring and connections related to the pedal assist system. Make sure all wires are properly connected and not frayed.
  3. If the problem persists, contact customer support for a controller diagnosis and potential replacement.

4. Brakes Not Responsive

Description: Unresponsive brakes can pose a serious safety concern for BPM R-750Z riders.

Cause of the Problem: Brake issues may result from worn brake pads, brake fluid leaks, or improper adjustment.


  1. Inspect the brake pads for wear and tear. Replace them if they are excessively worn.
  2. Check for any signs of brake fluid leaks. If you notice any, consult a professional for brake system repair.
  3. If the brakes feel loose or unresponsive, adjust them according to the bike’s user manual instructions.

5. Display Error Codes

Description: The BPM R-750Z features a display screen that may occasionally show error codes, causing confusion for riders.

Cause of the Problem: Error codes can indicate various issues, such as sensor malfunctions, electrical problems, or software glitches.


  1. Refer to the user manual for a list of error codes and their meanings. This can provide insights into the specific issue.
  2. If the error code persists, try restarting the bike by turning it off and on again. Sometimes, a simple reboot can resolve software-related errors.
  3. If the problem remains unresolved, contact customer support and provide them with the error code for further assistance.

6. Chain Slippage

Description: Riders may encounter issues with the bike’s chain slipping off the gears, disrupting their ride.

Cause of the Problem: Chain slippage can result from loose or improperly adjusted chain tension, damaged sprockets, or a misaligned derailleur.


  1. Inspect the chain’s tension. If it’s too loose, tighten it according to the manufacturer’s recommendations.
  2. Examine the sprockets for any signs of wear or damage. Replace them if necessary.
  3. Ensure the derailleur is properly aligned and adjusted. Make necessary adjustments following the bike’s manual.

7. Tire Punctures

Description: Punctured tires are a common issue that can leave riders stranded during their journey.

Cause of the Problem: Tire punctures are typically caused by sharp objects on the road, such as nails, glass shards, or thorns.


  1. Carry a tire repair kit with you during rides, including patches and a pump, to address minor punctures on the spot.
  2. If the puncture is severe, replace the inner tube or the tire itself. Follow the bike’s manual for guidance on tire replacement.
  3. Consider using puncture-resistant tires or tire liners to reduce the likelihood of future punctures.

8. Loose Bolts and Nuts

Description: Over time, vibrations from riding can cause bolts and nuts on the bike to loosen, potentially affecting its stability.

Cause of the Problem: The constant motion and vibrations while riding can gradually loosen bolts and nuts throughout the bike’s frame.


  1. Regularly inspect the bike’s components for loose bolts and nuts. Use a torque wrench to ensure they are properly tightened to the manufacturer’s specifications.
  2. Apply a thread locker or a locking nut to critical components to prevent them from loosening during rides.
  3. Consider adding nylon lock nuts or spring washers to areas prone to vibration-induced loosening.

9. Display Screen Issues

Description: Problems with the bike’s display screen, such as flickering or malfunctioning buttons, can be frustrating for riders.

Cause of the Problem: Display screen issues may result from electrical issues, loose connections, or software glitches.


  1. Check the display screen’s connections to ensure they are securely attached. Re-seat any loose cables if necessary.
  2. Restart the bike to see if the issue resolves itself. Sometimes, temporary glitches can be fixed with a reboot.
  3. If the problem persists, contact customer support for guidance on potential software updates or hardware repairs.

10. Noise from the Motor

Description: Unusual noises coming from the motor can be a sign of a mechanical issue that requires attention.

Cause of the Problem: Motor noise can result from loose components, worn bearings, or internal damage to the motor assembly.


  1. Inspect the motor for visible damage or loose parts. Tighten any loose components and replace damaged parts as needed.
  2. Lubricate motor bearings according to the manufacturer’s recommendations to reduce friction and noise.
  3. If the noise persists, consult a professional technician or contact customer support for motor diagnostics and potential repairs.

11. Shifting Gears Issues

Description: Riders may experience difficulties in shifting gears smoothly, affecting their ride experience.

Cause of the Problem: Gear shifting problems can arise from cable tension issues, misaligned derailleurs, or worn-out gear components.


  1. Check cable tension and adjust it if necessary to ensure smooth gear changes.
  2. Inspect the alignment of the derailleurs and make appropriate adjustments according to the bike’s manual.
  3. If gears continue to shift poorly, consider replacing worn gear components, such as chainrings or cassettes.

12. Uneven Tire Wear

Description: Uneven tire wear can lead to reduced traction and an unstable ride on the BPM R-750Z.

Cause of the Problem: Tire wear can be uneven due to improper inflation, misaligned wheels, or unbalanced loads.


  1. Maintain proper tire inflation based on the manufacturer’s recommendations to ensure even wear.
  2. Regularly inspect the alignment of the wheels and make necessary adjustments to prevent uneven tire wear.
  3. Distribute loads evenly on the bike to avoid excess weight on one side, which can cause uneven wear on specific tires.

13. Frequent Chain Slippage

Description: Some riders may face persistent issues with the bike’s chain slipping off the gears, disrupting their ride frequently.

Cause of the Problem: Frequent chain slippage can be caused by ongoing issues with chain tension, damaged gear teeth, or worn-out components.


  1. Regularly inspect and maintain chain tension to prevent frequent slippage. Adjust as needed.
  2. Examine the gear teeth for wear or damage and replace them if necessary.
  3. If chain slippage persists despite adjustments, consider upgrading to a higher-quality chain or consulting a bike technician.

14. Overheating Motor

Description: An overheating motor can lead to reduced performance and potential long-term damage to the BPM R-750Z.

Cause of the Problem: Overheating may occur due to extended use at high speeds, insufficient cooling, or motor overload.


  1. Monitor your riding habits and avoid extended periods of high-speed usage, which can contribute to motor overheating.
  2. Ensure that the motor has adequate ventilation and cooling to dissipate heat effectively.
  3. If overheating becomes a recurring issue, consult a professional for motor inspection and potential upgrades.

15. Loss of Pedal Assist Functionality

Description: Some riders may encounter issues where the pedal assist functionality stops working, impacting the bike’s overall performance.

Cause of the Problem: Loss of pedal assist can result from sensor malfunctions, electrical connectivity problems, or controller issues.


  1. Inspect the pedal assist sensors for any damage or disconnection. Replace or reattach as needed.
  2. Check the wiring and electrical connections related to the pedal assist system, ensuring they are securely connected.
  3. If pedal assist problems persist, contact customer support for a thorough diagnosis and potential replacement of components.

16. Braking System Noise

Description: Riders may notice unusual noises coming from the braking system when applying the brakes.

Cause of the Problem: Brake noise can be caused by contamination of brake pads, misalignment of brake components, or worn brake pads.


  1. Inspect the brake pads for contamination or wear. Clean or replace them if necessary.
  2. Check for any misalignment in the brake components and adjust them according to the manufacturer’s guidelines.
  3. If the noise persists, consider upgrading to quieter, high-quality brake pads for a smoother ride.

17. Loose Handlebars

Description: Loose handlebars can affect control and rider safety while operating the BPM R-750Z.

Cause of the Problem: Handlebar issues can result from loose stem bolts, worn grips, or improper assembly.


  1. Regularly check the stem bolts for tightness and ensure they are properly torqued to specification.
  2. Inspect the handlebar grips for wear or damage and replace them if they are in poor condition.
  3. If the handlebars continue to feel loose, consult a bike technician for a thorough inspection and repair.

18. Inaccurate Battery Level Reading

Description: Some riders may experience discrepancies in the battery level reading displayed on the bike’s screen.

Cause of the Problem: Inaccurate battery level readings can be due to sensor issues, software glitches, or aging batteries.


  1. Restart the bike to see if the battery level reading corrects itself. Temporary glitches can sometimes lead to inaccurate readings.
  2. Check for loose or damaged battery connectors. Secure or replace them if necessary.
  3. If the problem persists, consider replacing the battery with a new one to ensure accurate readings.

19. Unresponsive Pedal Assist Levels

Description: Riders may encounter issues with unresponsive pedal assist levels, making it challenging to control the bike’s assistance.

Cause of the Problem: Unresponsive pedal assist levels can result from controller malfunctions, wiring problems, or software issues.


  1. Inspect the wiring and connections related to the pedal assist system to ensure they are securely attached.
  2. Check for any signs of damage to the controller. If it appears damaged, consider replacing it with a new one.
  3. If the pedal assist levels remain unresponsive, consult the bike’s manufacturer or customer support for software updates or further assistance.

20. Rust on Frame Components

Description: Over time, rust can develop on the frame components of the BPM R-750Z, affecting both aesthetics and structural integrity.

Cause of the Problem: Rust can occur due to exposure to moisture, humidity, or neglecting proper frame maintenance.


  1. Regularly clean and dry the bike after rides, paying attention to areas prone to rust, such as the frame and bolts.
  2. If rust is present, gently remove it using a rust remover or fine-grade steel wool, followed by applying a protective coating to prevent further rusting.
  3. Consider applying a layer of bicycle-specific frame protection or wax to shield the frame from moisture and corrosion.

21. Acceleration Delay

Description: Some riders may notice a delay in acceleration when they start pedaling, impacting the bike’s responsiveness.

Cause of the Problem: Acceleration delay can result from sensor calibration issues, controller malfunctions, or software glitches.


  1. Check if the sensor calibration is correct according to the bike’s manual. Recalibrate if necessary.
  2. Inspect the controller for any signs of damage or loose connections. Replace or secure as needed.
  3. If acceleration delay persists, consult the manufacturer or customer support for potential software updates or repairs.

22. Handlebar Vibration

Description: Excessive handlebar vibration can make rides uncomfortable and affect overall control.

Cause of the Problem: Handlebar vibration may be caused by unbalanced wheels, improperly inflated tires, or worn-out grips.


  1. Ensure that the wheels are properly balanced to reduce vibration. Adjust as needed.
  2. Maintain correct tire pressure based on the manufacturer’s recommendations to minimize vibrations.
  3. Inspect and replace worn-out handlebar grips to improve grip and reduce discomfort during rides.

23. Headlight Malfunction

Description: The bike’s headlight may malfunction, impacting visibility during night rides.

Cause of the Problem: Headlight issues can result from wiring problems, a faulty bulb, or a malfunctioning switch.


  1. Check the wiring connections for the headlight and ensure they are securely attached and free from damage.
  2. If the headlight bulb is dim or not working, replace it with a new bulb suitable for the BPM R-750Z.
  3. If the headlight still doesn’t function, investigate the switch and wiring for possible defects or contact customer support for assistance.

24. Unpredictable Motor Assistance

Description: Riders may experience unpredictable motor assistance levels, making it challenging to control the bike’s speed.

Cause of the Problem: This issue can arise from controller problems, intermittent electrical connections, or software glitches.


  1. Inspect the controller for any visible damage or loose wiring. Address any issues you find.
  2. Check all electrical connections related to the motor system, ensuring they are secure and free from corrosion.
  3. If motor assistance remains unpredictable, consider updating the bike’s software or consulting the manufacturer for guidance.

25. Wobbly Wheels

Description: Wobbly wheels can affect stability and ride quality, potentially leading to accidents.

Cause of the Problem: Wheel wobbling can be caused by loose spokes, unbalanced rims, or a damaged wheel hub.


  1. Regularly check and tighten loose spokes to ensure wheel stability.
  2. Balance the rims or wheels as needed to reduce wobbling. Professional balancing may be required.
  3. If the wobbling persists, inspect the wheel hub for damage and replace it if necessary. Consult a bike technician for assistance.

BPM R-750Z Electric Bike User Reviews

When considering a purchase as significant as an electric bike like the BPM R-750Z, it’s invaluable to hear from users who have experienced it firsthand. Below, we summarize both positive and negative user reviews found on Walmart, giving you a comprehensive understanding of what BPM R-750Z Electric Bike owners have to say.

Positive Reviews from BPM R-750Z Electric Bike Users

  • Some users were satisfied with the comfortable and adjustable seat, making long rides enjoyable without discomfort.
  • Many users praised the impressive battery life of the BPM R-750Z, allowing for extended rides on a single charge.
  • Several riders highlighted the powerful motor and pedal assist functionality, which provided an extra boost when tackling challenging terrains or hills.
  • Users appreciated the sturdy and durable frame construction, offering confidence in the bike’s longevity and performance.
  • Positive remarks were made about the fat tires, providing excellent traction and stability, especially when riding on rough or uneven surfaces.

Overall, the majority of BPM R-750Z Electric Bike users shared positive feedback about various aspects of the bike, including its comfort, battery life, motor power, durability, and tire performance. These positive reviews indicate that the BPM R-750Z is generally well-received by riders.

Negative User Reviews of the BPM R-750Z Electric Bike

  • Some users were not satisfied with occasional issues related to brake squeaking, which affected the overall riding experience.
  • A few riders reported difficulties with the bike’s gear shifting, mentioning occasional misalignment and delays in changing gears.
  • Several users expressed concerns about the weight of the BPM R-750Z, stating that it can be challenging to maneuver, especially when navigating tight spaces.
  • Occasional instances of loose bolts and nuts were mentioned, requiring frequent checks and maintenance to prevent components from coming undone.
  • Some riders noted that while the battery life was generally good, it tended to degrade over time, resulting in shorter rides after prolonged use.

Despite some negative feedback regarding brake squeaking, gear shifting, weight, maintenance, and battery life degradation, it’s important to note that these issues appear to affect a smaller subset of BPM R-750Z Electric Bike users. The majority of users seem to have a positive experience with the bike, emphasizing its benefits and overall performance.

BPM R-750Z Electric Bike Manual

If you’re looking for the detailed operating instructions for your BPM R-750Z Electric Bike, you can find the official manual on the manufacturer’s website. Visit the manufacturer’s site to access the comprehensive manual, which includes important information on setup, maintenance, and troubleshooting.

BPM R-750Z Frequently Asked Questions

Q: How do I properly charge the BPM R-750Z’s battery?

A: To charge the battery, connect the charger to the bike’s battery port and plug it into a standard power outlet. Ensure that the charger is securely connected and follow the recommended charging time mentioned in the manual.

Q: What is the maximum weight capacity for the BPM R-750Z Electric Bike?

A: The BPM R-750Z is designed to support a maximum rider weight of 400 pounds. Exceeding this weight limit may affect the bike’s performance and safety.

Q: How can I troubleshoot pedal assist issues?

A: If you encounter problems with the pedal assist function, start by checking the pedal assist sensors for dirt or damage. Ensure all wiring and connections related to the pedal assist system are secure. If the issue persists, contact customer service for further assistance.

Q: What should I do if I experience a loss of power during a ride?

A: If you encounter a sudden loss of power while riding, first allow the bike to cool down if it has been used extensively. Check the motor for damage or unusual noises. Ensure the battery is adequately charged before each ride. If the problem continues, consult the manual for troubleshooting or contact customer support.

Q: Can I replace the brake pads myself if they wear out?

A: Yes, you can replace the brake pads yourself. Inspect the brake pads for wear and tear and replace them if they are excessively worn. The process is typically straightforward and outlined in the manual.


In case you encounter any problems with your BPM R-750Z Electric Bike, it’s essential to refer to the manual, reach out to customer service, or visit an authorized service center. These resources can provide you with the guidance and support you need to keep your bike in optimal condition and address any issues that may arise.

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