Varstrom 125XVH E-Bike Rear Hub Motor Conversion Kit

1. Safety Information

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

Always wear a helmet and appropriate safety gear when riding an e-bike. Ensure all components are securely installed and tightened before each ride. Do not operate the e-bike in conditions beyond its waterproof rating (IPX5) or in extreme temperatures.

2. Product Overview

The Varstrom 125XVH Rear Hub Motor Conversion Kit is designed to transform your standard bicycle into a powerful electric bike. This kit features a robust gear drive brushless motor, offering high power output and reliability for various riding styles, from city commuting to long-distance touring.

2.1. Kit Components

• Pre-built motor wheel with internal controller
• Left PAS (Pedal Assist System) sensor
• Brake lever (default, brake sensors optional)
• Front light
• Thumb throttle
• Waterproof connectors
• Installation tools
• Optional smart display (VD03, VD04, or EKD01)

2.2. Key Features

• Helical Gear Drive: Engineered for high-intensity use, offering superior wear resistance, long-lasting performance, and quieter operation (under 60dB noise).
• Optimized & Compact Layout: Significantly enhanced power and torque delivery.
• Waterproof Connectors: Enhanced splash and weather resistance (IPX5 rated). Not recommended for prolonged heavy rain.
• Ease of Installation: Features plug-and-play connections, making DIY installation straightforward.
• Versatile Compatibility: Supports V-Brake (rim brake) and Disc Brake systems. Compatible with various wheel sizes and rear dropout dimensions.

3. Setup and Installation

This section provides general guidelines for installing your Varstrom 125XVH E-Bike Conversion Kit. For detailed, step-by-step instructions, please refer to the included installation guide or consult a professional bicycle mechanic.

3.1. Compatibility Check

Before installation, ensure your bicycle is compatible with the kit. The motor is designed for a rear dropout size of 135-145mm and supports V-Brake or Disc Brake systems. It is compatible with 20", 26", 27.5", and 700C wheel sizes.

3.2. Motor Wheel Installation

1. Remove your bicycle's existing rear wheel.
2. Install the Varstrom hub motor wheel into the rear dropout, ensuring it fits securely within the 135-145mm range.
3. Secure the wheel using appropriate fasteners.

3.3. Component Connections

Connect all components using the provided waterproof connectors. The system is designed for plug-and-play installation to prevent miswiring.

• PAS Sensor: Install the PAS sensor on your pedal crank.
• Brake Levers/Sensors: Replace your existing brake levers with the provided ones, or install brake sensors if you prefer to retain your original levers (please specify when ordering).
• Display: Mount your chosen display (VD03, VD04, or EKD01) on the handlebars.
• Thumb Throttle: Install the thumb throttle on the handlebars.
• Headlight: Connect the front light.
• 1T4 Cable: Use the 1T4 cable to connect multiple accessories to the controller.
• Battery: Securely mount the battery (if purchased with the kit) and connect it to the system. Ensure the XT60 connector is properly linked.

4. Operating Instructions

4.1. Battery Operation

• Power Switch: The battery features a power switch. "O" indicates power off, while "I" indicates power on.
• Battery Indication: A simple press of the button on the battery illuminates the light to show the current charge level.
• USB Port: Some battery models include a USB port (5V 1A output) for charging phones or other gadgets.
• Anti-Theft Lock: Utilize the anti-theft lock to secure your battery and prevent unintentional drops.

4.2. Display Functions

Your kit may include one of three display models: VD03, EKD01, or VD04. Each offers unique features:

• VD03 Display: 1.5" LCD screen, 22.2mm holder, IP67 waterproof, 9 PAS levels. Supports English language.
• EKD01 Display: 2.4" TFT screen, 22.2/25.4mm holder, IP67 waterproof, 9 PAS levels. Features navigation function and supports remote locking/unlocking via the "BIKEGO+" APP. Quick-switch to 25 km/h street-legal mode by holding "+" and "-" buttons together. Supports multiple languages.
• VD04 Display: 3.5" IPS screen, 22.2/25.4/31.8mm holder, IP67 waterproof, 9 PAS levels. Features navigation function and supports remote locking/unlocking via the "BIKEGO+" APP. Quick-switch to 25 km/h street-legal mode by holding "+" and "-" buttons together. Supports multiple languages.

5. Maintenance

Proper maintenance ensures the longevity and optimal performance of your Varstrom e-bike conversion kit.

• Motor Care: The helical gears are designed for durability. Keep the motor area clean from excessive dirt and debris.
• Water Resistance: The system has an IPX5 waterproof rating, meaning it is protected against low-pressure water jets from any direction. While it can withstand splashes and light rain, prolonged exposure to heavy rain or submersion is not recommended and may void the warranty.
• Battery Care: Store the battery in a cool, dry place away from direct sunlight and extreme temperatures. Follow the charging instructions provided with your battery.
• Connector Inspection: Periodically check all waterproof connectors for secure fit and any signs of damage.

6. Troubleshooting

If you encounter issues with your e-bike kit, consider the following common solutions:

• No Power:
  • Ensure the battery is fully charged and properly connected.
  • Check that the battery's power switch is in the "ON" position.
  • Verify all electrical connections are secure and free from damage.
• Motor Not Engaging:
  • Check the PAS sensor for proper alignment and connection.
  • Ensure the throttle is correctly installed and functioning.
  • Verify the display is powered on and showing no error codes.
• Display Not Working:
  • Check the display's connection to the controller.
  • Ensure the main power to the system is on.
• Reduced Performance:
  • Check battery charge level.
  • Inspect motor and wheel for any obstructions or damage.

For persistent issues, please contact customer support.

7. Specifications

7.1. Motor Specifications (Varstrom 125XVH Gear Drive Brushless Motor)

7.2. Battery Specifications (Optional)

If you opted for a battery with your kit, refer to the specific model's specifications below. All batteries feature a built-in BMS for stable performance, including over current, over voltage, over load, over charge, over discharge, temperature control, short-circuit protection, and cell voltage balancing.

8. User Tips

• Battery Purchase: The conversion kit does not include a battery by default. If you require a battery, ensure you select the appropriate option during purchase. If ordered together, the battery will be shipped separately.
• Brake Sensor Option: The kit defaults to brake levers. If you prefer to use your existing brake levers, remember to specify that you need brake sensors instead when placing your order.
• App Connectivity: For EKD01 and VD04 displays, download the "BIKEGO+" app to utilize navigation and remote locking/unlocking features.

9. Warranty and Support

• Motor Warranty: 2 Years
• Parts Warranty: 30 Days
• After-sale Center: Support available in US / PL / FR / UK.

For any warranty claims or technical support, please contact your retailer or the Varstrom customer service directly.