1. Introduction
Welcome to the YADEA 20-inch Electric Bike user manual. This manual provides essential information for the safe operation, maintenance, and care of your new electric bicycle. Please read this manual thoroughly before your first ride to ensure optimal performance and safety.
Your YADEA electric bike is equipped with a high-performance OKAWA mid-motor and a 7-speed gear shifting system, designed for both daily commutes and leisure rides. It offers two riding modes: normal bike and power-assisted bike, along with features like adjustable components, a removable battery, and integrated lighting for convenience and safety.
2. Important Safety Warnings
⚠️ Disclaimer: Please mind potential fire risk and strictly follow the instruction manual for charging and storage. While using the product, please wear protective equipment and fully comply with the applicable law and regulations.
- Always wear a helmet and appropriate safety gear when riding.
- Ensure all components are securely fastened and in good working order before each ride.
- Familiarize yourself with local traffic laws and regulations for electric bicycles.
- Do not ride under the influence of alcohol or drugs.
- Avoid riding in adverse weather conditions (heavy rain, snow, ice) or on slippery surfaces.
- Do not exceed the maximum load capacity of the bicycle (120kg/264.6lbs) or the rear carrier (15kg/33.1lbs).
- Keep hands and feet away from moving parts, especially the chain and gears.
- Properly dispose of batteries according to local regulations.
3. Package Contents
Please check the package carefully to ensure all items are present:
- 1 x YADEA Electric Bicycle
- 1 x Charger with Adapter
- 1 x Wrench Pack
- 1 x User Manual
- 1 x Certificate
- 1 x Warranty Bill
- 2 x Keys
4. Initial Setup and Adjustments
Your YADEA electric bike comes partially assembled. Follow these steps for initial setup and adjustments:
4.1 Handlebar Adjustment
Adjust the handlebar height and angle to a comfortable riding position. Ensure the stem is inserted past the safety line and the bolts are tightened securely. Do not overtighten the handlebar bolts.
Image: Height and Angle Adjustable Stem and Handlebar. Ensure adjustments are made below the safety line.
4.2 Seat Post Adjustment
Adjust the seat post height to allow for a slight bend in your knee when the pedal is at its lowest point. Ensure the seat post is inserted past the safety line and the quick-release clamp is securely fastened.
Image: Height and Angle Adjustable Seat Post. Ensure adjustments are made below the safety line.
4.3 Pedal Installation
Attach the pedals to the crank arms. Note that pedals are typically marked 'L' for left and 'R' for right. The left pedal tightens counter-clockwise, and the right pedal tightens clockwise.
Image: Close-up of the pedals and kickstand.
5. Key Components Overview
Familiarize yourself with the main components of your YADEA electric bike:
Image: Labeled diagram of the YADEA Electric Bike components.
- OKAWA Mid-Motor: A precise and sensitive brushless mid-motor with bilateral torque sensor, 250W max power, 36V voltage, and IPX5 waterproof rating. It offers >75N.m torque and >80% efficiency.
- Battery: 36V 7.8Ah Lithium Battery, providing up to 60km (37 miles) range. It is removable for convenient charging.
- Transmission System: SHIMANO 7-speed rear derailleur for smooth gear changes across various terrains.
- Brakes: Front and rear V-brakes for reliable stopping power.
- Tires: 20-inch low rolling resistance tires suitable for urban environments.
- Frame: Shock-absorbent and strong 6061 aluminum alloy frame.
- Lighting: Adjustable 12V LED headlight and rear light for enhanced visibility and safety during night rides.
- Rear Carrier: Integrated rear carrier with a maximum load of 15kg (33.1lbs). (Note: Baskets shown in promotional images are for display only and not included).
- LCD Display: Provides information on battery level, 3-speed assistance level, gear, distance, and controls for lights and pushing assistance.
6. Operating Instructions
Watch this video for a visual guide on operating your YADEA electric bike:
Video: YADEA Electric Bike Features and Basic Operation.
6.1 Power On/Off
To power on or off the electric system, long press the power button (red circle with power symbol) on the LCD display unit located on the handlebar.
Image: LCD Display Unit with Power Button and Controls.
6.2 Riding Modes
Your bike supports two main riding modes:
- Normal Bike: Ride as a traditional bicycle without electric assistance.
- Power-Assisted Bike: The motor provides assistance as you pedal. You can select from 3 assistance levels using the '+' and '-' buttons on the LCD display.
Image: Two Switchable Riding Modes.
6.3 Bicycle Pushing Assistance Mode
For assistance when walking the bike, long press the '-' button on the LCD display. Release the '-' button to stop the assistance mode.
6.4 Light Control
To turn on/off the front and rear lights, long press the '+' button on the LCD display.
Image: Bright Headlight and Taillight for night riding.
6.5 Gear Shifting
Your bike is equipped with a 7-speed Shimano transmission system. Rotate the gear shifter on the right side of the handlebar to change gears, allowing you to adapt to different road conditions and exert less effort.
Image: Shimano 7-Speed Transmission System.
7. Battery and Charging
The YADEA electric bike is powered by a 36V 7.8Ah lithium battery.
7.1 Battery Parameters
Image: Battery Parameters and Max Mileage.
- Voltage: 36V
- Capacity: 7.8Ah
- Charging Time: Approximately 4 hours
- Max Mileage: Up to 60km (37 miles) on a full charge.
7.2 Charging Modes
The battery can be charged in two ways:
- Direct Charging: Charge the battery while it is installed on the bike.
- Unload and Charge: Remove the battery from the bike and charge it separately. This is convenient if you need to charge indoors or away from the bike.
Image: Two Charging Modes.
7.3 Battery Removal
To remove the battery:
- Insert the key into the battery lock.
- Turn the key to unlock the battery.
- Carefully slide the battery out of its housing.
- To reinstall, align the battery and slide it back into place until it clicks, then lock it with the key.
Image: Battery Removing Steps.
8. Maintenance
Regular maintenance ensures the longevity and safe operation of your electric bike.
- Cleaning: Clean the bike regularly with a damp cloth. Avoid using high-pressure water jets directly on electrical components.
- Tires: Check tire pressure before each ride. Maintain recommended pressure for optimal performance and safety.
- Brakes: Regularly inspect brake pads for wear and ensure brake levers are responsive. Adjust or replace as needed.
- Chain: Keep the chain clean and lubricated to prevent rust and ensure smooth gear changes.
- Bolts and Fasteners: Periodically check all bolts and fasteners for tightness, especially on the handlebars, seat post, and wheels.
- Battery Care: Store the battery in a cool, dry place. If storing for an extended period, charge it to about 50-70% and recharge every 1-2 months.
- Professional Service: For complex repairs or electrical issues, consult a qualified bicycle mechanic or the manufacturer's support.
9. Troubleshooting
Here are some common issues and their potential solutions:
- Bike not powering on: Check if the battery is properly installed and charged. Ensure the power button is long-pressed.
- Motor not assisting: Verify the battery has sufficient charge. Check if the assistance level is set above '0' on the LCD display. Ensure all electrical connections are secure.
- Gears not shifting smoothly: The chain might need lubrication or adjustment. The derailleur might require fine-tuning.
- Brakes feel weak: Brake pads might be worn, or brake cables need adjustment.
- Unusual noises: Inspect for loose components, rubbing parts, or foreign objects caught in the drivetrain.
If you encounter persistent issues not covered here, please contact customer support.
10. Specifications
| Feature | Specification |
|---|---|
| Model Number | YADEA 20'' Electric City Bike |
| Certification | CE |
| Rated Passenger Capacity | One Seat |
| Style | Standard Type |
| Max Speed | <30km/h (25km/h) |
| Range per Power | 31 - 60 km (60km/37mi) |
| Wattage | 200 - 250w (250W) |
| Power Supply | Lithium Battery |
| Voltage | 36V |
| Folded | Yes |
| Origin | Mainland China |
| Wheel Size | 20 inches (50cm) |
| Frame Material | Aluminum alloy (6061) |
| Battery Capacity | 7.8Ah |
| Charging Time | 4 hours |
| Motor Type | OKAWA built-in brushless mid-motor |
| Torque | >75N.m |
| Waterproof Rating | IPX5 (Motor) |
| Rear Derailleur | 7 Speed Gears (Shimano) |
| Brake Type | Front and rear V-brakes |
| Meter | 12V-LED 3-speed level |
| Max Load Capacity (Bicycle) | 120kg / 264.6lbs |
| Max Load Capacity (Rear Carrier) | 15kg / 33.1lbs |
| Size | 157cm x 89-95cm x 59cm (61.8" x 35"-37.4" x 23.2") |
| Net Weight | 22kg / 48.5lbs |
Image: YADEA Electric Bike Dimensions.
11. User Tips
- Pre-Ride Check: Always perform a quick check of tire pressure, brakes, and battery level before each ride.
- Gear Usage: Utilize the 7-speed gears effectively to optimize battery life and reduce strain on the motor, especially on inclines.
- Battery Range: The stated range is an estimate. Actual range may vary based on terrain, rider weight, assistance level used, and weather conditions.
- Charging Habits: Avoid completely draining the battery. Charge it regularly, and if storing for a long time, maintain a partial charge.
- Visibility: Even with integrated lights, consider wearing reflective clothing, especially when riding at dawn, dusk, or night.
12. Warranty and Support
Your YADEA electric bike comes with a Warranty Bill. Please refer to this document for specific warranty terms and conditions. For any technical assistance, troubleshooting beyond this manual, or warranty claims, please contact the seller or authorized service center.
