1. Introduzione
This manual provides detailed instructions for the installation, operation, and maintenance of your Varstrom 48V 500W/750W Ebike Hub Motor Conversion Kit. This kit is designed to transform a standard bicycle into an electric bicycle, offering enhanced power and speed for various riding conditions. Please read this manual thoroughly before installation and use to ensure safe and optimal performance.
2. Informazioni sulla sicurezza
Always prioritize safety during installation and operation. Wear appropriate safety gear, including a helmet. Ensure all connections are secure and waterproofed where necessary. Do not attempt to modify components beyond their intended design. Consult a professional bicycle mechanic if you are unsure about any installation steps.
3. Contenuto della confezione
Your Varstrom Ebike Hub Motor Conversion Kit includes the following components:
- Pre-laced Motor Wheel (Front or Rear Hub, depending on order)
- Controllore intelligente
- Leve freno (con sensori di interruzione del motore)
- Acceleratore a pollice
- PAS (sensore di assistenza alla pedalata)
- Wiring Cables (including 1T4 cable)
- Faro
- LCD Display (Optional, VD03, VD04, or EKD01)
- Manuale d'uso
Note: The ebike battery is sold separately and is not included in this kit.

Figura 1: Oltreview of included components and wiring connections.
4. Prodotto finitoview E specifiche
The Varstrom Ebike Hub Motor Kit is available in two main versions: Standard (125EVH) and Performance (125XVH), offering different power outputs and features to suit various riding needs.

Figure 2: Detailed specifications for various Varstrom hub motor models.

Figure 3: Comparison between Standard (125EVH) and Performance (125XVH) motor versions.
Caratteristiche principali:
- Alta efficienza: Motors achieve >80% efficiency for optimal power usage.
- Funzionamento silenzioso: Noise levels are kept below 60dB for a smoother ride.
- Grado di impermeabilità: IPX5 rating ensures reliability in various weather conditions.
- Durable Gears: Features durable nylon helical gears for extended lifespan (Performance version).

Figure 4: Illustration of the dual-layer gear system for improved torque and durability.
5. Compatibilità
The Varstrom Ebike Hub Motor Kit offers broad compatibility with various bicycle types and sizes:
- Dimensioni delle ruote: Compatible with 20", 26", 27.5", and 700C (28"/29") wheels.
- Dropout Widths: Rear hub motor fits bicycles with a rear dropout width of 135-145mm. Front-drive version is compatible with a 100mm dropout.
- Sistemi frenanti: Supports both Disc and V-Brakes.
- Ingranaggi: Compatible with cassette flywheels (not for screw-on freewheels) and works with up to 10-speed gear systems.

Figure 5: Guide for selecting the correct wheel size for your conversion kit.
6. Configurazione e installazione
Follow these general steps for installing your ebike conversion kit. Refer to the detailed wiring diagram (Figure 1) for specific connections.
- Prepara la tua bicicletta: Ensure your bicycle is clean and stable. Remove the existing front or rear wheel, depending on your kit type.
- Installare la ruota motrice: Mount the pre-laced motor wheel into the appropriate dropout (front or rear). Ensure it is securely fastened.
- Controller di montaggio: Secure the intelligent controller to your bicycle frame in a protected location, typically near the battery or motor.
- Install Brake Levers: Replace your existing brake levers with the provided ones, which include motor cut-off sensors.
- Attach Throttle: Install the thumb throttle on your handlebar.
- Installare il sensore PAS: Mount the Pedal Assist Sensor near your crankset. Note: A right-side PAS sensor is needed for hollow cranksets.
- Collegare il cablaggio: Carefully connect all components to the controller using the provided wiring cables. Match colors and connectors as per the wiring diagram. Ensure all connections are tight and protected from moisture.
- Installa Display: Mount your chosen display (VD03, VD04, or EKD01) on the handlebar and connect it to the main wiring harness.
- Collegare la batteria: Connect your 48V/52V ebike battery (sold separately) to the controller.
- Controlli finali: Before riding, double-check all connections, ensure brakes are functioning correctly, and verify that the motor engages and disengages properly.
Guide video di installazione:
Video 1: General installation guide for a Bafang Hub Motor Conversion Kit. (Source: Greenergia)
Video 2: Installation steps for a Hub Motor Kit. (Source: Lascycle)
7. Opzioni di visualizzazione
Customize your riding experience with three advanced display choices, all connecting to the BIKEGO+ app and featuring one-key speed limit adjustment:
- Schermo VD03: A compact 1.5" LED screen, ideal for limited handlebar space or budget-conscious users. Covers essential functions.
- Schermo VD04: A larger 3.5" IPS screen offering enhanced visuals and data clarity.
- Schermo EKD01: A wide 2.4" horizontal display, also providing enhanced visuals and data.

Figure 6: Visual representation of the VD03, VD04, and EKD01 display units.
8. Parametri della batteria (facoltativo)
While the battery is sold separately, here are typical parameters for compatible 48V/52V battery systems to help you choose based on your range and power needs:

Figure 7: Table detailing various battery specifications for different capacities and types.
9. Funzionamento
Once installed and the battery is connected, operate your ebike as follows:
- Accensione: Press and hold the power button on your display unit to turn on the system.
- Seleziona il livello di assistenza: Use the '+' and '-' buttons on the display to select your desired pedal assist level. Higher levels provide more motor assistance.
- Throttle Use: The thumb throttle provides instant power without pedaling. Use it for quick acceleration or maintaining speed.
- Frenata: The brake levers are equipped with motor cut-off sensors, which will instantly cut power to the motor when applied, ensuring safe stopping.
- Limite di velocità: Adjust the speed limit via the display (refer to display-specific instructions for details).
- Spegni: Press and hold the power button to turn off the system when you are finished riding.
10. Manutenzione
Regular maintenance will prolong the life and performance of your ebike conversion kit:
- Pulizia: Mantenere il motore, il controller e la batteria puliti e liberi da sporco e detriti. Utilizzare l'annuncioamp panno, evitare il lavaggio ad alta pressione.
- Connessioni: Periodically check all electrical connections for tightness and signs of corrosion. Ensure waterproof connections remain sealed.
- cavi: Inspect cables for any damage, fraying, or kinks. Replace damaged cables immediately.
- Cura della batteria: Follow the manufacturer's instructions for your specific battery regarding charging, storage, and temperature. Avoid fully discharging the battery.
- Componenti meccanici: Regularly check your bicycle's brakes, tires, and other mechanical parts as you would with a standard bike.
11. Risoluzione Dei Problemi
Se riscontri problemi, prova questi semplici passaggi per la risoluzione dei problemi:
- Nessun potere: Check battery charge, ensure battery is properly connected, and verify all main power cables are secure.
- Motore non innestato: Check PAS sensor alignment and connection. Ensure brake levers are not engaged (motor cut-off). Verify throttle connection.
- Display non funzionante: Check display cable connection to the controller. Ensure the battery has power.
- Potenza intermittente: Ispezionare tutti i cavi per verificare che non vi siano collegamenti allentati o danni.
For persistent issues, consult the detailed troubleshooting section in your kit's specific manual or contact Varstrom customer support.
12. Specifiche
| Attributo | Valore |
|---|---|
| Tipo di bici | Bici da città, bici elettrica |
| Fascia d'età (descrizione) | Adulto |
| Marca | Varstrom |
| Numero di velocità | 10 |
| Colore | Nero |
| Compatibilità delle dimensioni delle ruote | 20, 26, 27.5, 700C Inches |
| Materiale del telaio | Alluminio |
| Tipo di sospensione | Doppio |
| Caratteristiche speciali | Digital Display, Durable, Headlight, IPX5 Waterproof, Taillight |
| Nome del modello | US JJ R/F-125EVH+125XVH DZ |
| Fonte di alimentazione | Motore elettrico |
| Cosatage | 500 watts (750W option available) |
| Materiale della ruota | Alluminio |
| Assemblaggio richiesto | SÌ |
| Tipo di cambio per bicicletta | Pollice |
| Livello di abilità | Principiante |
| Configurazione del deragliatore | Posteriore |
| Tipo di trasmissione della bicicletta | Hub drive |
| Tipo di assistenza elettrica | Motore del mozzo |
| Frame Size (Dropout) | 135-145 millimeters (Rear), 100 millimeters (Front) |
13. Garanzia e supporto
Your Varstrom Ebike Hub Motor Conversion Kit comes with a warranty:
- Politica di ritorno: 30 days return.
- Riparare o sostituire: 365 days repair or replace.
For further assistance or technical support, please refer to the contact information provided with your purchase documentation.





