Varstrom 125XVH E-bike Conversion Kit Instruction Manual

1. Product Overview

The Varstrom 125XVH Rear Hub Motor Conversion Kit is designed to convert standard bicycles into electric bikes, offering enhanced power and intelligent features. This kit is available in two power versions: 500W and 750W, providing versatile options for various riding needs.

Key Features:

• Helical Gear Drive: Engineered for enhanced durability, smoother power delivery, and quiet operation (under 60dB noise).
• Brake Compatibility: Supports both V-Brake and Disc Brake systems, eliminating the need for brake modifications.
• Waterproof Rating: IPX5 rated, allowing confident riding in light rain (not recommended for heavy or prolonged exposure to water).
• Smart Display Options: Choose from VD03, VD04, or EKD01 displays with Bluetooth connectivity for APP lock/unlock, speed adjustment, and ride tracking.

Power Options:

• 750W Version: Max Speed: 55-60 km/h, Peak Power: 1056W, Max Torque: 80N.m.
• 500W Version: Max Speed: 45-50 km/h, Peak Power: 864W, Max Torque: 65N.m.

2. Setup and Installation

2.1 Choosing the Correct Wheel Size

Before installation, ensure you have selected the correct wheel size for your bicycle. The kit supports 20", 26", 27.5", and 700C wheel sizes. To determine your tire size, check the sidewall of your current bicycle tire for markings like "26x1.95" or "700C 32-50C".

Wheel Size Options:

2.2 Component Identification and Wiring

The Varstrom kit is designed for true plug-and-play installation. Refer to the diagram below for component identification and wiring connections. Ensure all connections are secure and waterproof.

Key Components:

1. Brake Lever or Brake Sensor (Optional)
2. Thumb Throttle
3. Display (Optional)
4. 1T4 Cable
5. Headlight
6. Controller & Box
7. PAS Sensor
8. Rear Hub Motor Wheel (Optional)
9. Battery (Optional)

The kit includes a pre-built motor wheel with an internal controller. The default brake lever is provided, but brake sensors can be requested if preferred. A front light and thumb throttle are also included. All connectors are waterproof.

Controller Specifications:

2.3 Battery Installation (if applicable)

If your kit includes a battery, install it securely according to its specific mounting instructions (downtube or rear rack). If using your own battery, ensure it is 48V and has an XT60 connector for compatibility.

3. Operating Instructions

3.1 Smart Display Functions

The kit offers various smart display options (VD03, VD04, EKD01), each providing different features and interfaces. All displays offer Bluetooth connectivity for mobile app integration.

Common Display Features:

• PAS Level: 9 levels of pedal assist.
• Waterproof: IP67 rating for all displays.
• Bluetooth Function: Connects to the 'BIKEGO+' APP for remote locking/unlocking and other smart features.
• Street-Legal Mode: Quick-switch to 25 km/h by holding the '+' and '-' buttons together.

Specific Display Features:

• VD03 Display: 1.5" LCD screen, φ22.2mm holder, supports English.
• EKD01 Display: 2.4" TFT screen, φ22.2/25.4mm holder, includes Navigation Function, supports multiple languages (English, French, Spanish, Italian, German, Polish, Dutch, Czech, Chinese).
• VD04 Display: 3.5" IPS screen, φ22.2/25.4/31.8mm holder, includes Navigation Function, supports multiple languages (English, French, Spanish, Italian, German, Polish, Dutch, Czech, Chinese).

3.2 Riding Modes

• Pedal Assist System (PAS): Provides assistance based on your pedaling input. Adjust the assist level via the display.
• Throttle Mode: Use the thumb throttle for power on demand, without pedaling.

4. Maintenance

4.1 General Care

• Regularly check all connections for tightness and wear.
• Keep the motor and controller clean and free from debris.
• While the kit is IPX5 waterproof, avoid submerging components or using high-pressure washers directly on electrical parts.

4.2 Battery Care

⚠️ Disclaimer: Please mind potential fire risk and strictly follow the instruction manual for charging and storage.

• Use only the provided smart charger or a compatible charger with the correct voltage (54.6V).
• Do not overcharge or completely discharge the battery.
• Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
• Charge the battery regularly, even if not in use, to maintain its health.
• The battery features a Built-in BMS for protection against over current, over voltage, over load, over charge, over discharge, temperature control, short-circuit, and cell voltage balancing.

5. Troubleshooting

If you encounter issues, check the following common problems:

• No Power: Ensure the battery is charged and properly connected. Check all wiring connections for looseness.
• Motor Not Assisting: Verify the PAS sensor is correctly installed and aligned. Check the display for any error codes.
• Display Not Turning On: Check battery connection and ensure the display cable is securely plugged into the controller.
• Inconsistent Power: Inspect all electrical connections for corrosion or damage. Ensure the throttle and PAS sensor are functioning correctly.

For persistent issues, consult the detailed troubleshooting guide in the full user manual (if available) or contact customer support.

6. Specifications

Motor Specifications:

Battery Specifications (Example for 48V 20Ah):

7. Warranty and Support

The Varstrom 125XVH E-bike Conversion Kit comes with a 12-month warranty. For any issues or support, please contact Greenergy Global Store directly. They offer a service commitment including fast delivery and refunds for delayed, lost, or damaged packages.

8. User Tips

• Always double-check your bicycle's rear dropout size (135-145mm) and wheel size before purchasing to ensure compatibility.
• For optimal battery life, avoid fully draining the battery and store it with a partial charge if not used for extended periods.
• Utilize the mobile app features (via Bluetooth display) for tracking your rides and customizing settings for a more personalized experience.
• Remember to switch to the 25 km/h street-legal mode when riding in areas with speed restrictions.