EMOKO C91
EMOKO Electric Bike User Manual
Model: C91
Brand: EMOKO
Introduction
This comprehensive user manual provides detailed instructions for the setup, operation, and maintenance of your EMOKO C91 Electric Bike. Please read this manual thoroughly before using your e-bike to ensure safe and optimal performance. For any assistance, refer to the support section.

Figure 1: EMOKO C91 Electric Bike (Black model)
Setup
1. Unboxing and Initial Inspection
Carefully remove all components from the packaging. Inspect for any damage during transit. Ensure all parts listed below are present.
Included Components:
- 1* Fast Charger
- 1* Set of Tools
- 1* 90% Assembled Electric Bike
- 1* User Manuals
Video 1: How to Install the EMOKO Electric Bike. This video provides a step-by-step guide for unboxing and assembly.
2. Assembly
The EMOKO C91 Electric Bike comes 90% pre-assembled. Follow these steps for final assembly. Refer to Video 1 for visual guidance.
Front Wheel Assembly: Loosen the screws of the front wheel, align it with the front fork, and re-tighten the screws securely. Ensure the disc brake is properly aligned.
Handlebar Assembly: Move the adjustable bar to the front and fix it. Adjust the head height to your preference and secure it.
Front LED Light Assembly: Attach the front LED light to the designated bracket on the front fork. Ensure the wire is connected correctly.
Front Mudguard Assembly: Install the front mudguard using the provided screws and tools.
Pedal Assembly: Attach the pedals to the crank arms. Note that pedals are typically marked 'L' for left and 'R' for right, and thread in opposite directions.
Seat Assembly: Secure the seat to the rear rack using the provided 6 screws.

Figure 2: The dual suspension system, featuring a hydraulic suspension fork and a mid-mounted shock absorber, provides a comfortable riding experience.
3. Battery Installation and Charging
The EMOKO C91 features a removable 48V 20Ah battery. To install, slide the battery into its compartment on the frame and lock it with the key. To charge, remove the battery or charge it directly on the bike. Connect the fast charger to the battery's charging port and then to a power outlet. The charger's red light indicates charging, and it will turn green when fully charged (approx. 5-6 hours).

Figure 3: The 48V 20Ah removable battery offers a long range of up to 65 miles in PAS mode and features IP56 waterproofing.
Operating Instructions
1. Powering On/Off
First, turn on the main power switch on the battery. Then, long-press the 'M' button on the LCD display to turn on the e-bike system.
2. Smart LCD Display
The smart LCD display provides real-time information about your ride. You can view speed, battery level, pedal assist level, and mileage at a glance. Use the '+' and '-' buttons to increase or decrease the speed level.

Figure 4: The smart LCD display shows essential riding information such as battery percentage, speed, and mileage.
Video 2: C91 Electric Bike Display Operation. This video demonstrates how to operate the LCD display and adjust speed levels.
3. Riding Modes
The EMOKO C91 offers 5 distinct riding modes to suit various preferences and terrains:
Pure Electric Mode: Utilize the throttle for propulsion without pedaling.
Pedal Assist Mode (PAS): The motor provides assistance as you pedal, with adjustable levels (1-5) for varying power output. This mode offers a range of up to 65 miles.
Foot-Operated Mode (Bike Mode): Ride the bike like a traditional bicycle, with power off and relying solely on pedaling.
Cruise Control Mode: Maintain a constant speed without continuously holding the throttle or pedaling.
7-Speed Gearbox: Adjust the appropriate speed according to the 12-speed transmission for mechanical pedaling.

Figure 5: Visual representation of the five cycling modes available on the EMOKO C91 Electric Bike.
4. Controls
The e-bike is equipped with a 7-speed gear system for mechanical pedaling and a throttle for electric propulsion. The dual disc brake system (front and rear) ensures safe and efficient stopping.
Video 3: C91 Electric Fat Tire Bike Functions Demo. This video showcases various functions and riding capabilities of the e-bike.
Maintenance
1. Battery Care
To prolong battery life, charge it regularly and avoid fully discharging it. The battery is equipped with overcharge protection, temperature protection, and short circuit protection. Store the battery in a cool, dry place when not in use for extended periods.
2. Tire Care
The 20"x4" wide tires feature a puncture-resistant design. Regularly check tire pressure to ensure it matches the recommended PSI (usually found on the tire sidewall) for optimal performance and safety. Inspect tires for any signs of wear or damage.

Figure 6: The 20x4 inch fat tires provide excellent grip and stability across various terrains, including mountain roads, city roads, sand, and snow.
3. Brake System
The e-bike is equipped with a dual disc brake system (front and rear). Regularly check the brake pads for wear and ensure the brake levers operate smoothly. If you notice any issues with braking performance, have them inspected by a qualified technician.
4. Suspension System
The EMOKO C91 features dual shock absorbers, including thickened front fork shock absorbers and a rear spring shock absorber. Keep the suspension components clean and free of debris. If you experience excessive bouncing or stiffness, consult a professional for adjustment or repair.
5. General Care
Keep your e-bike clean by wiping it down with a damp cloth. Avoid using high-pressure washers directly on electrical components. Lubricate the chain regularly to ensure smooth operation. Periodically check all bolts and fasteners for tightness.
Troubleshooting
If you encounter issues with your EMOKO C91 Electric Bike, consider the following common solutions:
E-bike not powering on: Ensure the battery is properly installed, locked, and fully charged. Check that the battery's main power switch is turned on, and then long-press the 'M' button on the display.
Motor not assisting: Verify that the pedal assist level is set above '0' on the LCD display. Check if the throttle is engaged (if using pure electric mode). Ensure all electrical connections are secure.
Reduced range: This could be due to low tire pressure, riding in higher assist modes, frequent stops and starts, or riding against strong headwinds. Ensure the battery is fully charged before each ride.
Brakes feeling spongy or weak: This may indicate air in the brake lines or worn brake pads. Professional inspection and adjustment are recommended.
For complex issues or repairs, it is highly recommended to seek assistance from professional e-bike service technicians.
Specifications
| Feature | Detail |
|---|---|
| Brand | EMOKO |
| Model Name | C91 |
| Motor | 1000W Brushless Motor (2000W Peak) |
| Max Speed | Up to 30-35 MPH |
| Battery | 48V 20Ah Removable Battery |
| Range | 40+ miles (pure electric), 65 miles (PAS mode) |
| Charging Time | 5-6 Hours |
| Tires | 20"x4" Fat Tires (Puncture-resistant) |
| Brake System | Front and Rear Disc Brake System |
| Suspension | Dual (Hydraulic Front Fork, Rear Spring Shock Absorber) |
| Gears | 7-Speed |
| Riding Modes | Pure Electric, Pedal Assist, Foot-Operated, Cruise Control, 7-Speed Gearbox |
| Display | Smart LCD Display (Speed, Battery, PAS Level, Mileage) |
| Special Features | USB Charging Port, Headlight, Taillight, Odometer |
| Frame Material | Alloy Steel |
| Item Weight | 80 Pounds |
| Max Weight Recommendation | 330 Pounds |

Figure 7: Key dimensions and weight specifications for the EMOKO C91 Electric Bike.

Figure 8: Detail of the 1000W (Peak 1200W) brushless motor, highlighting its 80 NM max torque, 1200W peak power, 35 MPH max speed, and 35° climbing capability.
Warranty and Support
EMOKO stands behind its products with a customer-friendly policy:
Return Policy: Enjoy a 30-day return policy for your peace of mind.
Warranty: The e-bike comes with a one-year or 180-day warranty for different parts, ensuring worry-free use.
Customer Service: Professional US online service is available to assist you with any inquiries or issues.
EMOKO is a technology company dedicated to providing a technological lifestyle, committed to fashionable design and first-class quality.
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