1. Introduction
This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Vivi Folding Electric Bike, Model AMAK00018. Please read this manual thoroughly before your first ride and keep it for future reference.

Image: The Vivi Folding Electric Bike, Model AMAK00018, in white.
2. Setup and Assembly
Your Vivi Folding Electric Bike comes partially assembled. Follow these steps carefully for complete setup. For visual guidance, please refer to the installation video below.
Video: Vivi Electric Folding Bike Installation Guide. This video demonstrates the assembly process for the electric bike.
2.1 Handlebar Installation
- Insert the handlebar stem into the front fork tube.
- Ensure the handlebar is aligned straight with the front wheel.
- Tighten the quick-release lever or bolts securely to fix the handlebar in place.
2.2 Front Wheel and Fender Installation
- Remove the protective cap from the front fork.
- Carefully align the front wheel with the fork dropouts, ensuring the brake rotor slides correctly into the brake caliper.
- Install the axle nuts and tighten them securely using a wrench.
- Attach the front fender to the designated mounting points on the fork and secure it with the provided screws.
2.3 Pedal Installation
Identify the left (L) and right (R) pedals. The left pedal has a reverse thread.
- Screw the left pedal (L) counter-clockwise into the left crank arm.
- Screw the right pedal (R) clockwise into the right crank arm.
- Tighten both pedals firmly with a wrench.
2.4 Seat Post and Saddle Installation
- Insert the seat post with the saddle into the frame's seat tube.
- Adjust the seat height to a comfortable and safe riding position.
- Secure the seat post using the quick-release lever, ensuring it is tight enough to prevent movement during riding.
2.5 Battery Installation and Removal
The 48V 374.4Wh removable battery is integrated into the bike's frame. To remove the battery for charging or security:
- Fold the e-bike first to access the battery compartment.
- Use the provided key to unlock the battery.
- Carefully pull the battery out of the frame.
- To reinstall, slide the battery back into the frame until it clicks into place, then lock it with the key.

Image: Close-up of the removable 48V 7.5Ah battery integrated into the bike frame, highlighting its features.
2.6 Folding Mechanism
The bike features a lightweight aluminum alloy collapsible frame for easy storage and transport.
- Locate the main folding latch on the frame.
- Open the safety lock and then the main latch.
- Fold the frame in half until it locks into its folded position.
- The handlebars and pedals can also be folded for a more compact size.

Image: The Vivi Folding Electric Bike demonstrating its foldable design for space-saving storage.
3. Operating Instructions
Familiarize yourself with the controls and riding modes before operating the bike.
Video: How to use the LED display on the Vivi Electric Bike. This video demonstrates the functions of the LED display.
3.1 Powering On/Off and LED Display
- To turn on the bike, long press the 'M' button on the LED display for a few seconds.
- The LED display shows current speed, battery level, and pedal assist mode (low, med, high).
- To turn off, long press the 'M' button again.

Image: The LED smart meter displaying the three main riding modes: Electric, Pedal Assist, and Normal Bike.
3.2 Riding Modes
- Electric Mode: Use the throttle for full electric power without pedaling.
- Pedal Assist Mode: The motor provides assistance as you pedal. Use the '+' and '-' buttons on the LED display to select from 5 speed assist levels.
- Normal Bike Mode: Turn off the electric assist to ride the bike like a traditional bicycle.
- Cruise Control Mode: Maintain a constant speed without holding the throttle. (Refer to specific instructions in the full manual for activation).
- Walk Assist Mode: Provides low-speed assistance for walking the bike. (Refer to specific instructions in the full manual for activation).
3.3 Gear Shifting
The bike is equipped with a professional 7-speed gear system. Use the shifter on the handlebar to change gears, allowing you to adapt to various terrains and inclines.

Image: Detail of the 7-speed gear system, designed for improved climbing ability.
3.4 Braking System
The bike features front and rear disc brakes for sensitive and effective stopping power. Always apply brakes smoothly and evenly.
4. Maintenance
Regular maintenance ensures the longevity and safe operation of your electric bike.
4.1 Battery Care and Charging
- Charge the 48V 374.4Wh Lithium-Ion battery using the provided charger.
- Charging time is typically 4-6 hours.
- Avoid completely draining the battery before recharging to prolong its lifespan.
- Store the battery in a cool, dry place when not in use.
4.2 Tire Maintenance
- Regularly check the tire pressure of your 20" x 2.4 fat tires. Maintain pressure within the recommended range printed on the tire sidewall.
- Inspect tires for wear, cuts, or punctures before each ride.

Image: The 20-inch fat tires are designed for durability and adaptability across different road conditions, including sand, highway, and gravel.
4.3 Brake Inspection
- Check brake levers for proper tension and responsiveness.
- Ensure brake pads are not excessively worn and are properly aligned with the rotors.
4.4 General Cleaning and Inspection
- Clean the bike regularly with a damp cloth. Avoid high-pressure washing directly on electrical components.
- Inspect the aluminum alloy frame for any signs of damage or stress.
- Ensure all bolts and fasteners are tight before each ride.
4.5 Security Serial Number
The Vivi ebike has a security serial number printed in a hidden location on the front of the bicycle. Please take a photo or record this number for your records. This serial number can be helpful in case of loss or theft.
5. Troubleshooting
This section addresses common issues you might encounter with your Vivi Folding Electric Bike.
- Bike Does Not Power On:
Ensure the battery is properly installed and locked with the key. Check if the battery is charged. Long press the 'M' button on the LED display to turn on the system. - Motor Not Assisting:
Verify that the pedal assist level is not set to '0' or that the electric mode is activated. Check battery charge. Ensure all electrical connections are secure. - Brakes Squealing or Ineffective:
Inspect brake pads for wear and replace if necessary. Check for proper alignment of brake calipers and rotors. Ensure brake cables are not loose. - Gears Not Shifting Smoothly:
Check the derailleur alignment and cable tension. Ensure the chain is clean and lubricated. - Unusual Noises:
Stop riding immediately and inspect the bike for loose components, rubbing parts, or any visible damage.
For issues not covered here or if problems persist, please contact Vivi customer service.
6. Specifications
Detailed technical specifications for the Vivi Folding Electric Bike, Model AMAK00018.
| Feature | Specification |
|---|---|
| Model Number | AMAK00018 |
| Frame Material | Aluminum Alloy |
| Wheel Size | 20 Inches |
| Tire Type | 20" x 2.4 Fat Tire, Anti-slip resistant |
| Motor | 500W (Peak 1000W) Brushless Gear Motor |
| Max Speed | 22 MPH |
| Torque | 65 N.M |
| Battery | 48V 374.4Wh Removable Lithium-Ion |
| Mileage Range | 22-50 miles (depending on mode) |
| Charging Time | 4-6 hours |
| Load Capacity | 330 lbs |
| Seat Height | 70cm-112cm (27.3inch-44.1inch) |
| Suspension Type | Front Suspension |
| Brake System | Front and Rear Disc Brakes |
| Gear System | 7-Speed |
| Display | LED 3-speed Smart Meter |
| Bicycle Weight | 25kg (55 lbs) |
| Certifications | SGS Certified to UL2849 |

Image: Illustration of the rear wheel drive 1000W peak gear motor, detailing its performance metrics.

Image: SGS UL 2849 certification details, ensuring product safety and reliability. For more information, visit SGS Certification.
7. Warranty and Support
7.1 Warranty Information
Vivi provides a 1-year limited warranty for the battery and motor. Please retain your proof of purchase for warranty claims.
7.2 Customer Support
If you have any questions, concerns, or require assistance, please contact Vivi customer service:
- Phone: +1 888 639 8191
- Working Hours: 9:00 AM - 6:00 PM EST (Monday-Friday)
- Email: service.viviebike@gmail.com

Image: Vivi Customer Service contact details for support.