1. Introduction
This manual provides essential information for the safe and efficient operation, assembly, and maintenance of your Qianchice K5 Dual Motor Electric Bike. Please read this manual thoroughly before your first ride and retain it for future reference.
The Qianchice K5 is an electric bicycle designed for adults, featuring dual motors for enhanced power and a full suspension system for comfort across various terrains. It is equipped with a 52V 36AH battery, 24-inch fat tires, and hydraulic disc brakes.
Image: Qianchice K5 Electric Bike in action, highlighting its powerful dual motors.
2. Setup and Assembly
Your Qianchice K5 electric bike arrives approximately 90% pre-installed. Final assembly typically involves attaching the handlebar, front wheel, headlight, and seat. A tool kit is included to assist with this process.
2.1 Assembly Video
For a detailed visual guide on assembling your e-bike, please refer to the official assembly video below:
Video: The Assembly Video of Qianchice E-bike Q12. This video demonstrates the step-by-step process for assembling your Qianchice electric bike, including attaching the front wheel, handlebars, and other components.
2.2 Battery Installation
The 52V 36AH lithium battery is detachable and lockable for convenient charging and security. Ensure the battery is correctly installed and locked before riding.
Video: How to install the new battery pack. This video illustrates the correct procedure for installing and securing the removable battery pack on your e-bike.
Image: Qianchice K5 Electric Bike with its removable battery being charged, highlighting the lockable design.
2.3 Connecting Dual Motor Cables
Proper connection of the dual motor cables is crucial for optimal performance. Follow the instructions in the video to ensure correct alignment and connection.
Video: Notes: How to connect the cables for dual motors? This video provides guidance on correctly connecting the cables for the dual motor system, ensuring proper function.
2.4 Adjusting Speed Limit
The e-bike's speed limit can be adjusted via the display settings. Refer to the video for instructions on how to modify this setting.
Video: How to Lift the speed Limit? This video demonstrates how to access and adjust the speed limit setting on your e-bike's display.
3. Operating Instructions
The Qianchice K5 offers multiple riding modes and features to enhance your riding experience.
3.1 Riding Modes and Assistance Levels
The e-bike is equipped with 24" x 4" fat tires suitable for various terrains and offers six distinct riding modes:
- Dual Motor Pure Electric Mode: Utilizes both motors for maximum power.
- Single Motor Pure Electric Mode: Operates with one motor for efficiency.
- PAS (Pedal Assist System) Mode: Provides electric assistance while pedaling.
- Walk Mode: Provides low-speed assistance for walking alongside the bike.
- Bike Mode: Traditional cycling without electric assistance.
- Cruise Mode: Maintains a set speed without continuous throttle input.
Five assistance levels are available, providing speeds of 18, 23, 29, 35, and 40-45 mph, depending on the selected mode and terrain. The professional 7-speed Shimano gear system further adapts to your riding needs.
Image: Six Riding Modes. This graphic illustrates the various operational modes available on the Qianchice K5 electric bike, suitable for different terrains and preferences.
3.2 Smart Digital LCD Display
The integrated LCD display provides real-time information and allows for control over various functions. A password feature can be activated for added security.
- Battery Level: Indicates remaining battery charge.
- Error Code: Displays diagnostic codes if issues arise.
- Current Speed: Shows real-time riding speed.
- Speed Unit: Toggle between KM/H and MPH.
- Light ON/OFF: Controls the headlight.
- Cruise: Indicates if cruise control is active.
- PAS Level: Shows the current pedal assist level.
- Average Speed: Displays average speed during a trip.
- Max Speed: Records the maximum speed achieved.
- Trip Odometer: Tracks distance for the current trip.
- Odometer: Records total distance traveled.
Image: Smart Digital LCD Display. This image details the e-bike's control panel, showing the LCD display with its various indicators and controls like the Shimano 7-speed shifter and thumb throttle.
3.3 Safety Lighting System
The e-bike is equipped with a safety lighting system for visibility and safety, especially during low-light conditions. This includes a 6.9W bright LED headlight and 2W running and brake lights.
Image: Safety Lighting System. This graphic highlights the e-bike's LED headlight and integrated running/brake lights for improved visibility.
3.4 5V USB Charging Phone Holder
A phone holder with a built-in 5V USB charging port is provided for convenience. This allows you to charge your phone while riding (charging cable not included).
Image: 5V USB Charging Phone Holder. This image displays the phone holder with its integrated USB charging capability.
3.5 Adjustable Comfortable Saddle
The ergonomic, breathable saddle can be adjusted in height, fore, and aft to suit riders of different heights and preferences, ensuring a comfortable riding position.
Image: Adjustable Comfortable Saddle. This graphic highlights the features of the e-bike's saddle, including its adjustability and shock absorption.
4. Maintenance
Regular maintenance ensures the longevity and safe operation of your Qianchice K5 electric bike.
4.1 Battery Care
The 52V 36AH lithium battery is IP64 waterproof. For optimal performance and lifespan:
- Charge the battery fully before first use.
- Avoid completely draining the battery.
- Store the battery in a cool, dry place when not in use.
- Charge the battery regularly, even if the bike is not used frequently.
- Use only the provided charger.
4.2 Brake System
The dual hydraulic disc brakes provide strong and reliable stopping power. Regularly inspect brake pads for wear and ensure brake fluid levels are adequate. If you notice reduced braking performance or unusual noises, have the system inspected by a qualified technician.
Image: Dual Hydraulic Disc Brake. This graphic illustrates the hydraulic disc brake system, emphasizing its responsive braking capability.
4.3 Tires
The 24" x 4" fat tires are designed for all-terrain use. Maintain proper tire pressure as specified on the tire sidewall for optimal performance and safety. Regularly check for punctures or damage.
Image: Adapt to Any Road. This graphic highlights the versatility of the 24" x 4.0" wear-resistant fat tires across different terrains.
4.4 Suspension System
The AWD full suspension system, including a lockable hydraulic suspension fork and an independent hydraulic rear shock, requires periodic inspection. Ensure all components are clean and free from damage. The lockable front fork allows adjustment for different riding conditions.
Image: Dual Suspension System and Dual Hydraulic Disc Brakes. This image illustrates the e-bike's suspension and braking components, including the lockout fork and hydraulic disc brakes.
Image: Premium Frame & Full Suspension Design. This graphic details the e-bike's aluminum alloy frame and full suspension components, including the rear suspension and lockable front fork.
5. Troubleshooting
If you encounter issues with your Qianchice K5 electric bike, consider the following general troubleshooting steps:
- No Power: Check if the battery is fully charged and properly seated. Ensure all electrical connections are secure.
- Motor Not Engaging: Verify that the PAS level is set correctly and the throttle is functioning. Check for any error codes on the LCD display.
- Braking Issues: Inspect brake pads for wear and ensure cables (if mechanical) or hydraulic lines are intact. Adjust brake levers if necessary.
- Unusual Noises: Identify the source of the noise. It could be loose components, rubbing brakes, or issues with the drivetrain.
For persistent problems or complex repairs, contact customer support for assistance.
6. Specifications
| Feature | Specification |
|---|---|
| Bike Type | Electric Bike |
| Model Number | K5 |
| Brand | Qianchice |
| Motor Power | 9000W Peak Dual Motor (2*2000W nominal) |
| Torque | 220 Nm |
| Battery | 52V 36AH Lithium (IP64 waterproof) |
| Range (PAS Mode) | Up to 100 miles |
| Range (Pure Electric Mode) | Up to 37 miles |
| Max Speed | 40-45 MPH |
| Climbing Angle | Up to 45° |
| Wheel Size | 24 inches |
| Tire Width | 4 inches (Fat Tires) |
| Frame Material | Aluminum |
| Suspension Type | Full Suspension (Lockable Hydraulic Fork, Independent Hydraulic Rear Shock) |
| Brake Style | Dual Hydraulic Disc Brakes |
| Number of Speeds | 7 (Shimano) |
| Item Weight | 82.1 pounds |
| Maximum Weight Recommendation | 330 pounds |
| Minimum User Height | 5.2 feet |
| Included Components | Tool Kit, Battery Keys, Backseat, Charger, E-bike User Manual, LCD Display Manual, Pedals, Installation Tools |
Image: Q12 Ebike Dimensions and Package Contents. This graphic provides detailed measurements of the e-bike and lists all items included in the package.
7. Warranty and Support
Qianchice offers comprehensive support for your electric bike:
- Warranty: 12-month parts-replacing service for main components including the motor, battery, and controller.
- Technical Support: Lifetime technical support is provided.
- Response Time: Solutions will be offered within 24 hours on business days for any questions or concerns.
- Packaging: Please retain the original packaging box for one month after receipt for potential returns or service needs.
For assistance, please contact Qianchice customer service.