1. Киришүү жана коопсуздук маалыматы
This manual provides essential instructions for the safe installation, operation, and maintenance of your Varstrom 125XVH-ZH Rear Hub Motor Ebike Conversion Kit. Please read this manual thoroughly before attempting installation or operation. Retain this manual for future reference.
1.1 Жалпы коопсуздук эскертүүлөрү
- Электр велосипедин тебүүдө ар дайым туулга жана тиешелүү коопсуздук каражаттарын кийиңиз.
- Бардык туташуулардын бекем жана зарыл болгон жерде суу өткөрбөй тургандыгын текшериңиз.
- Do not modify the motor, controller, or battery system. Unauthorized modifications can lead to malfunction, injury, or void the warranty.
- Regularly inspect your bicycle and the conversion kit components for wear, damage, or loose connections.
- Be aware of local regulations regarding electric bicycles, including speed and power limits.
- Keep children and pets away from the kit components during installation and operation.
- Avoid exposing the battery to extreme temperatures, direct sunlight, or moisture.
2. Пакеттин мазмуну
Verify that all components listed below are present in your package. If any items are missing or damaged, contact Varstrom customer support immediately.

Сүрөт 2.1: Бүттүview of the Varstrom Ebike Conversion Kit components, including the rear hub motor wheel, battery, display, controller, throttle, brake levers, PAS sensor, and wiring.
- Rear Hub Motor Wheel (Pre-laced to selected rim size: 20"/26"/27.5"/700C)
- Мотор контроллери
- Controller Case
- Brake Levers (or Hydraulic Brake Sensors)
- Thumb Throttle
- PAS (Pedal Assist Sensor)
- Vastrom LCD Display (Optional, specific model may vary)
- Battery (Optional, specific model may vary)
- Узартуу кабель
- 1T4 Cable (Main wiring harness)
- Фара
- Plastic Straps for cable management
- Көрсөтмө (бул документ)
3. Продукт бүтүп калдыview
The Varstrom 125XVH-ZH kit converts a standard bicycle into an electric bicycle, providing pedal assistance or throttle-controlled power. It features a robust rear hub motor and a comprehensive set of components for a complete conversion.
3.1 Негизги өзгөчөлүктөрү
- Powerful Brushless Rear Hub Motor: Available in 48V 500W or 48V 750W configurations, offering efficient and quiet operation.
- Advanced Helical Gearing: Optimized internal structures for wear resistance and extended lifespan, ensuring durability and quiet performance.
- Кеңири шайкештик: Fits 20" (500W only), 26", 27.5", and 700C bicycle frames with 135mm-145mm rear dropout spacing. Compatible with both disc brakes and V-brakes.
- Интеграцияланган контроллер: Manages power delivery and system functions.
- Optional Display: Provides real-time riding data, battery status, and control over assist levels.
- Waterproof Connectors: Designed for enhanced splash and weather resistance (IPX5 rated motor).

Image 3.1: The Varstrom 125XVH-ZH rear hub motor, highlighting its power, speed, torque, and waterproof rating.

Image 3.2: Illustration of the advanced helical gearing and internal design for high-intensity use, emphasizing wear-resistance and longevity.
4. Шайкештик
Before installation, ensure your bicycle meets the following compatibility requirements:
- Rear Dropout Spacing: Your bicycle frame must have a rear dropout spacing of 135mm to 145mm (5.31" to 5.71").
- Дөңгөлөктүн көлөмү: The kit is available for 20" (500W version only), 26", 27.5", and 700C wheel sizes. Select the kit that matches your bicycle's wheel size.
- Тормоз түрү: Compatible with both disc brakes and V-brakes.
- Cassette Flywheel: Supports cassette flywheels with up to 10 speeds.

Image 4.1: Detailed motor dimensions and rear dropout compatibility (135-145mm).

Сүрөт 4.2: Мисamples of various bicycle types compatible with the Varstrom motor, including mountain bikes, road bikes, cargo bikes, city bikes, recumbent trikes, and folding bikes.
5. Орнотуу жана орнотуу
Installation of the Varstrom Ebike Conversion Kit requires basic mechanical skills. If you are unsure about any step, consult a professional bicycle mechanic.
5.1 Орнотуу диаграммасы

Image 5.1: Comprehensive wiring diagram showing the connection points for the hub motor, controller, battery, display, throttle, brake levers, PAS sensor, and headlight.
5.2 Орнотуу боюнча этап-этабы менен көрсөтмө
- Велосипедиңизди даярдаңыз:
- Remove the existing rear wheel from your bicycle.
- If applicable, transfer your cassette flywheel to the new motor wheel.
- Install the Motor Wheel:
- Carefully insert the Varstrom rear hub motor wheel into the bicycle's rear dropouts. Ensure the motor cable exits towards the non-drive side.
- Secure the wheel with the provided axle nuts, ensuring it is centered and tight.
- Контроллерди орнотуу:
- Find a suitable location on your bike frame for the controller and its case, typically near the seat tube or down tube.
- Secure the controller case using screws or straps. Place the controller inside.
- Install the PAS Sensor:
- Mount the PAS sensor on the bottom bracket spindle, typically on the non-drive side. Ensure the magnet disc is properly aligned with the sensor.
- Install Handlebar Components:
- Mount the thumb throttle, brake levers (or brake sensors), and the display (if included) onto the handlebars. Adjust their positions for comfortable access.
- Зымдарды туташтыруу:
- Connect the motor cable to the controller.
- Connect the 1T4 cable to the controller, then connect the throttle, brake levers, display, and headlight to the 1T4 cable.
- Connect the PAS sensor to the controller.
- If using an optional battery, connect it to the controller.
- Ensure all connections are firm and secure. Use plastic straps to manage and secure cables, preventing them from interfering with moving parts.
- Акыркы текшерүүлөр:
- Бардык байланыштарды эки жолу текшериңиз.
- Ensure the wheel spins freely and the brakes function correctly.
- Verify that no cables are pinched or obstructing steering or pedaling.
6. Операция
Once installed, operating your Varstrom ebike conversion kit is straightforward. Familiarize yourself with the display and controls before your first ride.
6.1 Display Functions (Optional)
If your kit includes a display, it provides crucial information and control over the ebike system. Common display models include VD03, EKD01, and VD04, each offering varying features.

Image 6.1: Comparison of available display units (VD03, EKD01, VD04) showing their screen sizes, mounting options, PAS levels, waterproof ratings, and additional features like Bluetooth and navigation.
- Күйгүзүү/өчүрүү: Системаны күйгүзүү же өчүрүү үчүн дисплейдеги кубат баскычын басып, кармап туруңуз.
- Жардам деңгээлин тандоо: Use the '+' and '-' buttons to cycle through pedal assist levels (typically 0-9). Level 0 provides no assistance.
- дроссель операциясы: The thumb throttle provides power on demand, independent of pedaling. Use it cautiously, especially at higher assist levels.
- Маалымат дисплей: The display shows current speed, battery level, trip distance, total distance, and assist level.
- Фараны башкаруу: The headlight can typically be turned on/off via a button on the display or a separate switch.
- Street-Legal Mode (25 km/h): Some displays (EKD01, VD04) offer a quick-switch to a 25 km/h street-legal mode by holding the '+' and '-' buttons together.
- Bluetooth & App Connectivity: Certain displays (EKD01, VD04) support Bluetooth for remote locking/unlocking and advanced ride data tracking via the 'BIKEGO+' app.
6.2 Минүү боюнча кеңештер
- Start in a low assist level to get accustomed to the motor's power.
- Use the throttle sparingly until you are comfortable with the ebike's acceleration.
- Always be aware of your surroundings and traffic.
- Plan your routes considering battery range, especially for longer rides.
7. Техникалык тейлөө
Regular maintenance ensures the longevity and safe operation of your Varstrom ebike conversion kit.
7.1 Жалпы кам көрүү
- Тазалоо: Wipe down the motor, controller, and battery with a damp кездеме. Жогорку басымдагы суу агымдарын түздөн-түз электрдик тетиктерге колдонуудан алыс болуңуз.
- Байланыштары: Бардык электр туташууларынын бекемдигин жана коррозияга туруктуулугун мезгил-мезгили менен текшерип туруңуз.
- Кабелдер: Inspect cables for fraying, cuts, or damage. Replace damaged cables immediately.
- бекиткичтер: Ensure all bolts and nuts, especially those securing the motor wheel, are tightened to the manufacturer's specifications.
7.2 Battery Care (If applicable)
- Заряддоо: Use only the charger provided with your battery. Do not overcharge or completely discharge the battery.
- Сактагыч: Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures. If storing for extended periods, charge it to 50-70% every few months.
- Жоюу: Dispose of old or damaged batteries according to local regulations for lithium-ion batteries.
8. Кыйынчылыктарды
This section addresses common issues you might encounter with your ebike conversion kit.
| Көйгөй | Мүмкүн себеп | Чечим |
|---|---|---|
| Мотор кубат бербей жатат | Батарея заряды аз Бошоң электр байланышы PAS sensor not engaged Brake lever sensor activated | Батареяны заряддоо Check all cable connections, especially motor and battery Ensure PAS sensor is correctly installed and magnet disc is spinning Check brake levers are fully released |
| Дисплей күйбөй жатат | Battery not connected or dead Loose display cable Бузулган дисплей | Батареянын туташуусун жана зарядын текшериңиз Ensure display cable is securely plugged into the 1T4 cable Алмаштыруу үчүн колдоо бөлүмүнө кайрылыңыз |
| Педаль жардамы туура эмес | PAS sensor misalignment Damaged PAS sensor | Adjust PAS sensor and magnet disc alignment Inspect PAS sensor for damage, replace if necessary |
| Мотордон чыккан адаттан тыш үндөр | Loose spokes Ички мотор маселеси | Check spoke tension and tighten if loose Колдонууну токтотуп, колдоо бөлүмүнө кайрылыңыз |
If you encounter an issue not listed here or if the suggested solutions do not resolve the problem, please contact Varstrom customer support.
9. Техникалык шарттар
Detailed technical specifications for the Varstrom 125XVH-ZH Rear Hub Motor Ebike Conversion Kit.

Image 9.1: Table detailing motor specifications including brand, model, type, rated power, peak power, rated voltage, max speed, max torque, spoke hole count, brake type, cassette type, efficiency, noise grade, waterproof rating, and operation temperature.
| Спецификация | 48V 500W Version | 48V 750W Version |
|---|---|---|
| Бренд | Варстром | |
| Модел | 125XVH | |
| Type | Gear Drive Brushless Rear Hub Motor | |
| Номиналдуу кубаттуулук | 500 Вт | 750 Вт |
| Чоку күч | 864 Вт | 1056 Вт |
| Rated Voltage | 48V | |
| Максималдуу ылдамдык | 45-50 KM/H (approx. 31 MPH) | 55-60 KM/H (approx. 37 MPH) |
| Max Torque | 65 Нм | 80 Нм |
| Спок тешиги | 36H * 12G | |
| Тормоз түрү | Диск тормозу / V тормозу | |
| Кассета түрү | ≤10 ылдамдык | |
| Натыйжалуулук | >80% | |
| Noise Grade | <60дб | |
| Суу өткөрбөйт | IPX5 | |
| Иштөө температурасы | -20°C ~ 45°C | |
9.1 Controller Specifications
| Controller Model | DC Rated Voltage | Номиналдуу кубаттуулук | Чектөө агымы | Номиналдуу ток | Томдун астындаtage Коргоо | Ашык-томtage Коргоо |
|---|---|---|---|---|---|---|
| 48V500W | 48V | 500 Вт | 22±1A | 11±1A | 39±1V | 62.4V |
| 48V750W | 48V | 750 Вт | 22±1A | 11±1A | 39±1V | 62.4V |
9.2 Battery Specifications (Optional)
If you purchased a battery with your kit, refer to the specific battery model for detailed specifications. Below is a general overview of common Varstrom battery options.

Image 9.2: Table comparing various Varstrom battery models, including voltage, capacity, cell type, BMS max protection current, USB port availability, weight, cycle life, and charger compatibility.
10. Кепилдик жана колдоо
Varstrom products are designed for quality and reliability. For warranty information and customer support, please refer to the following:
10.1 Кепилдик маалыматы
Please retain your proof of purchase for warranty claims. The warranty period and terms may vary by component. Typically, motors and controllers come with a 1-year warranty against manufacturing defects. Batteries (if purchased from Varstrom) usually have a separate warranty period. For detailed warranty terms, please visit the official Varstrom webсайтка же кардарларды колдоо менен байланышыңыз.
10.2 Кардарларды колдоо
If you have any questions, require technical assistance, or need to make a warranty claim, please contact Varstrom customer support through the following channels:
- Официалдуу Webсайт: зыярат кылыңыз Varstrom Store on Amazon продукт жөнүндө маалымат жана колдоо шилтемелери үчүн.
- Электрондук почта: Refer to your purchase documentation for the customer support email address.
- Онлайн байланыш формасы: Check the Varstrom official website for a contact form.
When contacting support, please provide your product model (125XVH-ZH), purchase date, and a detailed description of the issue.





