1. Johdanto
Thank you for choosing the SUTTO 36V 250W E-Bike Hub Motor Conversion Kit. This kit is designed to transform your standard bicycle into an electric bicycle, offering enhanced riding experience with pedal assistance or full electric power. This manual provides essential information for the safe installation, operation, and maintenance of your conversion kit. Please read it thoroughly before installation and use.
2. Turvallisuustiedot
Turvallisuutesi on ensiarvoisen tärkeää. Noudatathan seuraavia turvallisuusohjeita:
- Käytä aina kypärää ja asianmukaisia turvavarusteita sähköpyörällä ajaessasi.
- Ensure all components are securely installed and tightened before each ride.
- Regularly check brakes, tires, and electrical connections.
- Do not operate the e-bike in adverse weather conditions (heavy rain, snow, ice) if not designed for such use. The display has an IP65 waterproof rating, but other components may vary.
- Familiarize yourself with local regulations regarding e-bike use, speed limits, and power output.
- Keep hands and clothing away from moving parts, especially the motor and freewheel.
- Disconnect the battery before performing any maintenance or adjustments.
- Do not modify the motor or controller. Unauthorized modifications can lead to malfunction and void the warranty.
3. Pakkauksen sisältö
The SUTTO E-Bike Conversion Kit includes the following components. Please verify all items are present upon unboxing:

Figure 3.1: All included components for the SUTTO E-Bike Conversion Kit.
- Hub Motor Wheel (1)
- Downtube Battery (Optional, shown in image, check your specific kit variant) (2)
- DZ40 Display (3)
- Controller Box (4)
- Ohjain (5)
- PAS Right Big Sensor (6)
- Thumb Throttle (7)
- 1T4 Cable (8)
- Mechanical Brake Levers (9)
- Liitäntäkaapeli (10)
- Shimano 7 Speed Freewheel (11)
- Hexagonal Wrench Set (12)
- Headlight (13)
- Crank Removal Tool (14)
- Axle Removal Tool (15)
- Plastic Straps (16)
- Installation Manual (Book)
4. Asennus ja asennus
This section guides you through the installation process. Professional installation is recommended if you are unfamiliar with bicycle mechanics.
4.1 Asennusta edeltävät tarkastukset
- Jarru tyyppi: This kit is designed exclusively for bicycles with disc brakes only.
- Rear Dropout Width: Measure the rear dropout width of your bicycle frame. It must be between 130mm and 140mm for proper motor installation. The motor mounting width is 138mm.
- Pyörän koko: Ensure the conversion kit's wheel size matches your bicycle's tire size. The corresponding size is typically marked on the outer tire. This kit is compatible with 26", 27.5", 700C (28"), and 29" wheels.

Figure 4.1: Rear dropout width and wheel compatibility.
4.2 Component Installation Steps
- Valmistele pyörä: The hub motor is pre-mounted in the rim. Transfer your original bicycle tire and inner tube onto the new hub motor wheel. Ensure the tire is seated correctly and inflated to the recommended pressure.
- Vapaarattaan asentaminen: Attach the Shimano 7-speed freewheel to the hub motor.
- Mount Hub Motor Wheel: Install the hub motor wheel into the rear dropout of your bicycle frame, ensuring the axle is properly seated and secured with the provided nuts.
- Jarruvipujen asentaminen: Remove your original brake levers and install the new mechanical brake levers (9). These levers include a cut-off switch for safety.
- Asenna peukalokaasu: Mount the thumb throttle (7) on your handlebar in a comfortable position.
- Install DZ40 Display: Mount the DZ40 LCD display (3) on your handlebar.
- Asenna PAS-anturi: Use the crank removal tool (14) and axle removal tool (15) to remove your bicycle's crank arm and bottom bracket. Install the PAS Right Big Sensor (6) on the right side of the bottom bracket, ensuring it is correctly aligned with the pedal cadence. Reinstall the crank arm.
- Mount Controller and Controller Box: Secure the controller (5) inside the controller box (4). Mount the controller box to your bicycle frame in a suitable location, often near the seat tube or downtube.
- Asenna ajovalo: Mount the headlight (13) on your bicycle.
- Johdotusliitännät: Carefully connect all components to the controller using the 1T4 cable (8) and other connection cables (10). Refer to the wiring diagram below for correct connections. Use plastic straps (16) to neatly secure all cables along the frame.

Kuva 4.2: Kytkentäkaavio.

Figure 4.3: Controller and Connector Details.
Liittimen tiedot:
- 1T4 EU-BUS Connector: 8-nastainen naaras
- Battery Connector (XT60): Red -- Positive "+", Black -- Negative "-"
- Headlight Connector (White): Red -- Positive "+", Black -- Negative "-"
- Taillight Connector (Black): Red -- Positive "+", Black -- Negative "-"
- PAS Sensor Connector: 3-nastainen naaras
- Hub Motor Connector: 9-nastainen naaras
4.3 Battery Installation (If applicable)
If your kit includes a downtube battery, install it securely onto the frame mount. Ensure the battery is locked into place to prevent accidental detachment during riding. Connect the battery cable to the controller's battery connector (XT60).

Figure 4.4: Battery specifications and dimensions.
5. Käyttöohjeet
Once installed, your e-bike conversion kit offers various modes of operation.
5.1 DZ40 LCD Display
The DZ40 LCD display provides essential information and control over your e-bike's functions.

Figure 5.1: DZ40 LCD Uart Display.
- PAS-taso: The display shows the current Pedal Assist System (PAS) level, typically from 0 to 5. Adjust this level using the buttons on the display to control the motor's assistance.
- Tietonäyttö: The display shows speed, battery level, and other relevant riding data.
- Vedenpitävä: The display has an IP65 waterproof rating, suitable for outdoor use.
5.2 Toimintatilat
The SUTTO E-Bike Conversion Kit supports three primary operating modes:

Figure 5.2: Operating Modes and Key Specifications.
- 1. Electric Bike Mode: Use the thumb throttle to engage the motor and propel the bicycle without pedaling. The maximum speed is approximately 25-32 km/h.
- 2. Pedal Assisted Mode (PAS): The PAS sensor detects your pedaling and provides motor assistance based on the selected PAS level on the DZ40 display. This mode enhances your pedaling effort.
- 3. Walk Assisted Mode: This mode provides low-speed motor assistance, useful when pushing the bicycle uphill or through crowded areas. Consult your display manual for activation.
5.3 Brake Lever Function
The mechanical brake levers are equipped with safety cut-off switches. When either brake lever is engaged, power to the motor is immediately cut, ensuring safe stopping and preventing accidental acceleration.
6. Huolto
Säännöllinen huolto varmistaa sähköpyörämuunnossarjan pitkän käyttöiän ja turvallisen toiminnan.
- Puhdistus: Clean the motor, controller, and display with a damp Vältä korkeapaineisen vesisuihkun käyttöä suoraan sähkökomponentteihin.
- Sähköliitännät: Tarkista säännöllisesti kaikkien sähköliitäntöjen tiiviys ja korroosio. Varmista, etteivät kaapelit ole puristuksissa tai vaurioituneet.
- Jarrut: Regularly inspect brake pads and rotors for wear. Adjust or replace as necessary to maintain effective braking.
- Renkaat: Maintain correct tire pressure. Check for punctures or excessive wear.
- Vapaapyörä: Keep the freewheel clean and lubricated for smooth operation.
- Akun hoito: If your kit includes a battery, follow the manufacturer's guidelines for charging, storage, and temperature. Avoid fully discharging the battery.
- Yleinen polkupyörän huolto: Continue to perform regular maintenance on your bicycle's mechanical components (chain, gears, bearings, etc.) as you would with a standard bike.
7. Vianmääritys
Tässä osiossa käsitellään yleisiä ongelmia, joita saatat kohdata.
- Ei moottorille tulevaa virtaa:
- Tarkista akun lataustaso.
- Ensure all electrical connections are secure, especially the battery and motor connectors.
- Verify the display is powered on.
- Check if brake levers are slightly engaged, cutting power.
- PAS Not Working:
- Ensure the PAS sensor is correctly installed and aligned.
- Check the PAS sensor cable connection to the controller.
- Verify the PAS level on the display is set above 0.
- Kaasuvipu ei reagoi:
- Check the throttle cable connection.
- Varmista, että jarrukahvat eivät ole kytkettyinä.
- Näyttö ei käynnisty:
- Check battery connection and charge.
- Inspect the display cable for damage and ensure it's securely connected.
- Moottorista kuuluvat epätavalliset äänet:
- Stop riding immediately.
- Check for loose components or obstructions.
- Ota yhteyttä asiakastukeen, jos ongelma jatkuu.
For issues not covered here, please consult the detailed installation book included with your kit or contact customer support.
8. Tekniset tiedot
| Ominaisuus | Erittely |
|---|---|
| Merkki | Varstrom (SUTTO sub-brand) |
| Moottorin tyyppi | 36V 250W Brushless Gearless Hub Motor |
| Maksimi vääntömomentti | 45 Nm |
| Max nopeus | 25–32 km/h |
| Yhteensopivat pyöräkoot | 26", 27.5", 700C (28"), 29" |
| Jarrujen yhteensopivuus | Disc Brake Only |
| Rear Dropout Width | 130 - 140 mm (Motor width: 138 mm) |
| Näyttö | DZ40 LCD Uart Display (IP65 Waterproof) |
| PAS-tasot | 5 tasoa |
| Vapaarata | Shimano 7-Speed Freewheel |
| Ohjaimen nimellisäänenvoimakkuustage | 36V |
| Ohjaimen nimellisvirta | 7A |
| Controller Max. Current | 15A |
| Controller Low Voltage Suojaus | 29V |
| Ohjaimen koko | 90 mm x 50 mm x 30 mm (3.54" x 1.97" x 1.18") |
| Päämateriaali | Alumiini |
| Item Weight (Motor) | 3.9 kg |
9. Takuu ja tuki
SUTTO (Varstrom) is committed to customer satisfaction and product quality.
- Takuu: The hub motor is covered by a one-year warranty. All other components included in the kit are subject to a 6-month warranty.
- Takuuvaatimukset: In case of a defect or malfunction within the warranty period, please contact your retailer or Varstrom customer support with your proof of purchase.
- Tukea: For technical assistance, troubleshooting, or any questions regarding your SUTTO E-Bike Conversion Kit, please refer to the contact information provided by your retailer or on the official Varstrom websivusto.