Introduction
Welcome to the AYOLNY EB3/EB3S Electric Mountain Bike user manual. This guide provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your new electric bicycle. Please read this manual thoroughly before your first ride to ensure optimal performance and safety.
Safety First: Always wear a helmet and appropriate safety gear when riding. Familiarize yourself with local regulations regarding electric bicycles.
Product Overview
The AYOLNY EB3/EB3S is a versatile electric mountain bike designed for adults and teens, offering a powerful motor, long-range battery, and a comfortable riding experience across various terrains.
Key Features:
- High-Performance Motor: Equipped with a 1500W peak brushless motor, providing steady power and a maximum speed of 20 MPH.
- Long-Range Battery: Features a detachable 36V 15Ah battery, offering up to 50 miles range in pedal-assist mode with a 5-6 hour full charge time.
- Reliable Shimano 7-Speed Drivetrain: Ensures smooth and precise gear shifting for various road conditions, from flat roads to uphill climbs.
- 26x1.95-inch Rugged Tires: Thickened mountain tires provide strong grip and shock absorption for stable riding on city roads, gravel paths, and mountain trails.
- Smart Display with APP & USB Charging: G51 smart display shows real-time speed, mileage, and battery level. Supports APP connectivity for riding management and includes a built-in USB port for mobile phone charging.
- Sturdy Frame & High Load Capacity: Reinforced alloy steel frame supports up to 330 LBS, ensuring stable and safe riding.

Image: The AYOLNY EB3/EB3S Electric Mountain Bike highlighting its powerful 1500W peak motor, 80 N.M torque, 22MPH top speed, and 7-speed gears, shown with a rider on a winding road.

Image: A person lifting the AYOLNY EB3/EB3S Electric Mountain Bike, emphasizing its lightweight (54.7 lbs) and strong geometric frame, which is rust-free and corrosion-resistant.
Setup & Assembly
Your AYOLNY EB3/EB3S electric bike arrives 90% pre-assembled. Follow these steps to complete the assembly:
1. Handlebar Installation:
- Remove the top cap and loosen the side bolts on the stem.
- Insert the handlebar into the stem, ensuring the cables are not twisted.
- Align the handlebar with the front wheel and tighten the side bolts, then replace the top cap and tighten.
2. Front Wheel Installation:
- Remove the protective cap from the front fork.
- Carefully insert the front wheel into the fork dropouts, ensuring the brake rotor aligns with the caliper.
- Secure the wheel with the quick-release skewer or axle nuts, ensuring it is centered and tight.
3. Pedal Installation:
- Identify the 'L' (left) and 'R' (right) markings on the pedals.
- Thread the 'R' pedal clockwise into the right crank arm.
- Thread the 'L' pedal counter-clockwise into the left crank arm.
- Tighten both pedals securely with a wrench.
4. Seat and Rear Reflector Installation:
- Insert the seat post into the frame's seat tube. Ensure the minimum insertion line is not visible.
- Adjust the seat height to your comfort and secure it with the quick-release lever.
- Attach the rear reflector to the seat post or rear fender as desired.
5. Front Fender Installation:
- Attach the front fender to the fork using the provided bolts and nuts.
- Ensure the fender is centered over the wheel and does not rub against the tire.
6. Front Reflector Installation:
- Attach the front reflector to the handlebar.
- Adjust its position for optimal visibility.

Image: Close-up views of the AYOLNY EB3/EB3S Electric Mountain Bike's adjustable seat cushion, front damping system, clear headlight, and anti-slip tires, highlighting comfort and safety features.
Operating Instructions
1. Power On/Off:
- To power on the bike, press and hold the 'M' button on the display for a few seconds.
- To power off, press and hold the 'M' button again.
2. Display Functions:
- The G51 smart display shows current speed, mileage, battery level, and assist mode.
- Use the '+' and '-' buttons to cycle through assist levels (0-5).
- Press the 'M' button briefly to switch between different display modes (e.g., ODO, TRIP, VOL).
3. Riding Modes:
- Pure Pedal Only: Ride the bike like a traditional bicycle without motor assistance.
- Pedal Assist (PAS) Mode: The motor provides assistance as you pedal. Adjust the assist level using the '+' and '-' buttons.
- Throttle Mode: Engage the throttle for full electric power without pedaling.
4. APP Connectivity:
- Download the companion app (refer to the QR code on the bike or packaging for download instructions).
- Connect your smartphone via Bluetooth to manage riding data, adjust settings, and lock/unlock the bike.

Image: A detailed view of the AYOLNY EB3/EB3S Electric Mountain Bike's speed and shifting system, featuring a digital display with 5 speed modes (8/10/12/15/20 MPH) and a Shimano 7-speed drivetrain for smooth gear changes.

Image: The AYOLNY EB3/EB3S Electric Mountain Bike is depicted in different environments, including city streets, snowy landscapes, forest trails, and beach travel, emphasizing its adaptability to various terrains with its 26-inch tires.
Official Product Videos:
Powerful Mountain E-Bike: Conquer Any Hill with Zero Effort
Video: This video demonstrates the powerful capabilities of the AYOLNY EB3/EB3S Electric Mountain Bike, showcasing its ability to easily ascend steep inclines and navigate challenging terrain with minimal effort.
Get to know the upgraded EB3 electric bike
Video: An in-depth look at the upgraded features and design of the AYOLNY EB3 Electric Bike, providing a comprehensive overview of its components and functionalities.
Charging Operation
To charge your AYOLNY EB3/EB3S electric bike:
- Locate the charging port on the battery pack.
- Ensure the bike is powered off before charging.
- Connect the charger to the charging port, then plug the charger into a standard wall outlet.
- The indicator light on the charger will typically turn red during charging and green when fully charged.
- Charging time is approximately 5-6 hours for a full charge.
- Do not overcharge the battery. Disconnect the charger once the battery is full.

Image: A detailed view of the AYOLNY EB3/EB3S Electric Mountain Bike's 36V 15Ah detachable battery, showcasing its LED lighting, fast charging capability (5-6 hours), and BMS 3.0 smart protection system.
Maintenance
Regular maintenance ensures the longevity and safe operation of your electric bike:
- Cleaning: Wipe down the bike with a damp cloth after each ride. Avoid using high-pressure water jets directly on electrical components.
- Tire Pressure: Check tire pressure regularly. Maintain the recommended PSI (usually found on the tire sidewall) for optimal performance and safety.
- Brakes: Inspect brake pads and cables for wear. Adjust brake tension as needed to ensure responsive braking.
- Chain: Keep the chain clean and lubricated to prevent rust and ensure smooth pedaling.
- Fasteners: Periodically check all bolts, nuts, and quick-release levers to ensure they are securely tightened.
- Battery Care: Store the battery in a cool, dry place. If storing for extended periods, charge it to 50-70% and recharge every 2-3 months.
Troubleshooting
Here are some common issues and their potential solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Bike does not power on | Low battery; loose battery connection; faulty display. | Charge battery; check battery connection; contact support. |
| Motor not assisting | PAS level 0; loose motor cable; faulty sensor. | Increase PAS level; check motor cable connections; contact support. |
| Brakes feel weak | Worn brake pads; loose brake cable; air in hydraulic system (if applicable). | Adjust brake cable tension; replace brake pads; consult a bike mechanic. |
| Unusual noises | Loose components; dry chain; rubbing fender. | Check all fasteners; lubricate chain; adjust fender position. |
For issues not listed here or if solutions do not resolve the problem, please contact AYOLNY customer support.
Specifications
| Feature | Detail |
|---|---|
| Bike Type | Electric Bike, Mountain Bike |
| Age Range | Adult |
| Brand | AYOLNY |
| Number of Speeds | 7 |
| Wheel Size | 26 Inches |
| Frame Material | Alloy Steel |
| Suspension Type | Dual |
| Special Features | Adjustable Seat, Detachable Battery, Digital Display, Dual Disc Brake |
| Brake Style | Disc |
| Power Source | Electric motor |
| Lithium Battery Energy Content | 374.4 Watt Hours |
| Electric Assist Type | Hub motor, Pedal assist, Throttle assist |
| Maximum Weight Recommendation | 330 Pounds |
| Assembly Required | Yes |

Image: The AYOLNY EB3/EB3S Electric Mountain Bike with key dimensions and specifications: 26.8 inches handlebar width, 39.4 inches height, 66.5 inches length. Recommended rider height is 5.3-6.1 feet, maximum load capacity is 264 LBS, and the e-bike weighs 54.7 LBS.
Warranty & Support
Your AYOLNY EB3/EB3S Electric Mountain Bike comes with a 1-Year Warranty covering manufacturing defects. For warranty claims, technical assistance, or any questions regarding your product, please contact AYOLNY customer support through the retailer's platform or the official AYOLNY website.
Please retain your proof of purchase for warranty validation.