VINFAST DRGNFLY User manual

USER MANUAL
E-BIKE LONG SADDLE

USER MANUAL - 04

TABLE OF CONTENT
Table of Content.1
TABLE OF CONTENT
1. Introduction ...................................................................... 1
1.1. Message from VinFast ................................................ 1
1.2. Documentation instructions ........................................ 1
2. Safety information .......................................................... 3
2.1. Location of important labels ..................................... 3
2.2. Safety information ...................................................... 5
2.2.1. Safety for the user ................................................ 5
2.2.2. Vehicle Safety ...................................................... 6
2.2.3. Fire Safety and Environmental Protection ........... 7
3. Assembly of the bike ........................................................ 8
3.1. Components in the Box ............................................... 8
3.2. Bike assembly Instructions ......................................... 9
3.2.1. Handlebar Assembly ............................................ 9
3.2.2. Pedal Installation ................................................ 11
3.3. Removing and Installing Lithium-ion Battery .......... 12
3.3.1. Installing the battery on the bike ........................ 12
3.3.2. Removing the Battery from the Bike ................. 13
4. Explore the Bike's Features ....................................... 14
4.1. Rider's Perspective .................................................... 14
4.2. Left View .................................................................. 15
4.3. Right view ................................................................. 16
4.4. Bike bell .................................................................... 17
4.5. Electric Throttle (For electric bikes equipped with an
electric throttle) ................................................................ 17
4.6. Disc Brakes ............................................................... 18
4.7. Charging port ............................................................ 18
4.8. Battery switch ............................................................ 19
4.9. Front lights and rear lights ......................................... 19
4.10. Front shock absorber setting .................................... 19
4.11. Included Charging Kit ............................................. 21
4.12. Charging the bike .................................................... 21
4.12.1. Battery Charging Procedure on the Bike .......... 22
4.12.2. Battery Charging Procedure Off the Bike ......... 22
4.12.3. Charger Indications .......................................... 23
4.12.4. Usage Tips ........................................................ 23

TABLE OF CONTENT
Table of Content.2
4.13. Lithium-ion Battery ................................................... 23
4.13.1. Overview of Lithium-ion Battery ........................ 23
4.13.2. Lithium-ion Battery Management System .......... 25
4.14. Multi-Function Display Screen (HMI) ....................... 26
4.14.1. Battery capacity bar ........................................ 27
4.14.2. Assist mode display......................................... 27
4.14.3. Parameter display ............................................ 27
4.14.4. Setting Parameters on the Screen .................... 28
4.15. Mobile application ................................................. 36
4.16. Software Update..................................................... 36
5. Startup and Operation ................................................. 38
5.1. Basic operation ........................................................ 38
5.2. Pre-operation check ................................................. 38
5.3. Turn on/off the bike's electrical system.................... 39
5.3.1. Turn ON the bike .............................................. 39
5.3.2. Turn off the bike ............................................... 39
5.4. Operating Your Electric Bike .................................. 39
5.4.1. First-Time Operation ......................................... 39
5.4.2. Walking Mode ................................................... 39
5.4.3. Zero Assist Mode ............................................... 40
5.4.4. Assist Mode ....................................................... 40
5.4.5. Full Electric Mode (With Electric Throttle) ....... 40
5.4.6. Braking .............................................................. 40
5.4.7. Stopping/Turning off the Bike ........................... 40
5.4.8. Parking the bike ................................................. 40
6. Periodic Maintenance and Adjustments ...................... 41
6.1. Basic Information ..................................................... 41
6.1.1. Recommendations .............................................. 41
6.1.2. Maintenance Schedule ....................................... 41
6.2. Basic Maintenance Principles ................................... 44
6.2.1. Check Front and Rear Brakes............................. 44
6.2.2. Check and Lubricate the Left and Right Brake
Levers .......................................................................... 44
6.2.3. Checking Brake Lever Wear .............................. 45
6.2.4. Brake Light Switch ............................................ 45

TABLE OF CONTENT
Table of Content.3
6.2.5. Lights/Bells/Switches/HMI Screen .................... 45
6.2.6. Front Shock Absorber Check ............................. 45
6.2.7. Front and rear wheel axle ................................... 46
6.2.8. Tire ..................................................................... 47
6.2.9. Rims check ......................................................... 48
6.2.10. Spokes check .................................................... 49
6.2.11. Check the wheel bearings ................................. 49
6.2.12. Check and lubricate the side stand.................... 50
6.2.13. Headset cup check ............................................ 50
6.2.14. Lithium-ion Battery .......................................... 51
6.2.15. Chainring .......................................................... 51
7. Troubleshooting ............................................................. 53
7.1. The HMI screen displays an error icon ..................... 53
7.2. Turn the throttle and the bike won't run .................... 54
7.3. Unable to Start the Bike ............................................ 54
8. Vehicle Care and Preservation ..................................... 55
8.1. Vehicle Care ............................................................. 55
8.2. Bike Wash ................................................................. 55
9. Specifications .................................................................. 57
9.1. Vehicle Identification Number ................................. 57
9.1.1. Frame number .................................................... 57
9.1.2. Motor number .................................................... 59
9.2. Specifications ........................................................... 60

INTRODUCTION
1
Congratulations and thank you for choosing the DrgnFly electric bike. Your choice has contributed to making our living environment
greener and cleaner.
This user manual provides you with valuable knowledge to familiarize yourself with the operation of the DrgnFly electric bike, as
well as proper maintenance and care instructions for your bike.
All information in this document is accurate as of the time of printing. Due to continuous product improvement policies, VinFast
reserves the right to make changes to the content without prior notice. For the latest product information from VinFast, please visit:
www.vinfastauto.com.
NOTE: This user manual should be considered an essential part of your bike. It should be carefully stored for easy reference, and it
should accompany the bike when ownership is transferred.
When you require repairs or maintenance, please bring your bike to VinFast's authorized Distributors and Service workshops. The
technicians at the Distributors and Service workshops (trained and certified by VinFast) will provide you with the most dedicated and
attentive service.
1.2. Documentation instructions
⚠ WARNING!
Please read this entire document carefully before
operating the vehicle. Do not attempt to operate the vehicle until you have a full
understanding of the control system and operational features of the bike. Regularly inspect the bike, perform appropriate
maintenance, and ensure good driving skills to use
the vehicle safely and reliably. Skipping some content in this document may
result in the loss of warranty rights.
Please refer to the table of contents to identify the specific content section you are looking for.
1.1. Message from VinFast
1. Introduction

INTRODUCTION
2
In the document, there are some highlighted sections that you should pay special attention to:
⚠
DANGER!:
Indicates points that could lead to injury for you or others.
WARNING!: Highlights points that could potentially damage your electric bike.
CAUTION: Specifies special procedures that must be followed to prevent damage to the bike or other property.
Abbreviation Definition
HMI Human-Machine-Interface TFT
BMS Lithium-ion Battery management system
SOC Remaining Lithium-ion battery level
MCU Motor control unit

SAFETY INFORMATION
3
Read and understand all labels on the bike. These labels contain important information for safe and proper bike operation. Do not
remove any labels from the bike. If these labels become difficult to read or peel off, visit VinFast's Distributors and Service
workshops for replacement.
1. Battery usage guide label
2. Lithium-ion Battery usage caution label
2.1. Location of important labels
2. Safety information

SAFETY INFORMATION
4
3. Label
A. Marking label 01 & 02
B. Class label
A B

SAFETY INFORMATION
5
2.2. Safety information
2.2.1. Safety for the user
 Read all the instructions before using the product.
 To reduce the risk of injury, close supervision is necessary when the product is used near children
 Never ride under the influence of alcohol or drugs.
 Before riding, ensure you understand the operation procedures and have proficient riding skills.
 Always wear a certified quality helmet.
 Use safety equipment when riding:
+ Use dustproof eyewear when riding and a face shield or unobstructed eye protection.
+ Wear bright-colored clothing or reflective gear when riding at night.
 Maintain a serious riding posture: Keep both hands on the handlebars, both feet on the pedals, and refrain from using your phone or
listening to music while riding.
 Avoid abrupt throttle and acceleration. To maximize braking efficiency, use both brakes gently and avoid sudden braking.
 Always obey road traffic safety regulations and speed limits. Pay attention to road conditions and traffic while riding.
 Adjust the throttle to match the terrain you are riding on. Gradually apply the throttle when starting.
 Be aware of signals from other vehicles and ensure that other road users can see you. Use your bell when necessary. Always use
your lights when riding in low light conditions.

SAFETY INFORMATION
6
 Ride cautiously in adverse weather and terrain conditions.
 Ensure that you park or stop the vehicle on a flat and secure surface.
 In the event of a fire with the electric vehicle, extinguish the fire with a dry powder fire extinguisher. Then, apply other water-based
firefighting methods if necessary.
 Riding in adverse weather conditions such as heavy rain or flooding can not only be dangerous for the rider but can also cause
damage to the vehicle's electrical system.
 Do not put fingers or hands into the product.
 The A-weighted emission sound pressure level at the driver ears is less than 70 dB(A).
2.2.2. Vehicle Safety
 Check the vehicle before operation to ensure the condition of the vehicle and the best driving experience.
 Frequently take the vehicle to an authorized dealership for regular inspections and maintenance.
 Do not let raincoats or bulky cargo obstruct the lights on the vehicle.
 The vehicle structure is designed for only one driver.
 Absolutely do not carry passengers or cargo exceeding the vehicle's load capacity.
 Operating in wet and flooded road conditions: The engine is designed to be sealed and waterproof, but to ensure safety and engine
longevity, it is recommended to limit operating when the flood level is higher than the motor shaft.
 Operating an electric vehicle in extremely hot weather may result in reduced vehicle performance to reduce heat generation.
Lithium-ion batteries will stop operating when the internal battery temperature exceeds 65ºC (149ºF).

SAFETY INFORMATION
7
 Your electric bike is designed only for use on paved roads or flat surfaces. Therefore, you should not ride on stairs, jump, perform
wheelies, or engage in similar actions.
 Electric bikes are not designed for participating in races or competitions.
 Do not add any electrical devices to the vehicle without VinFast's permission. These devices may damage the vehicle, interfere with
the normal operation of other vehicle components, or significantly reduce the vehicle's range or the lifespan of the lithium-ion battery.
 Do not use this product if the flexible power cord or output cable is frayed, has broken insulation, or any other signs of damage.
 This equipment is not intended to be used at ambient temperatures less than -10°C (14°F) or above ambient temperatures of 45°C
(113°F).
 The battery is intended to be charged when the ambient temperature is between 0°C (32°F) and 45°C (113°F). Never charge the
battery when ambient temperatures are outside this range.
2.2.3. Fire Safety and Environmental Protection
 Comply with all legal regulations when disposing of used batteries.
 Do not attempt to repair the battery yourself in case of a malfunction; instead, take it to the nearest VinFast service center for
repairs.
 Do not place the vehicle near flames or heat sources such as stoves or heaters, as this can cause the battery to become extremely hot
and potentially catch fire or explode.
 Do not crush or puncture the battery. Avoid applying excessive pressure to the battery, as this can lead to internal short-circuits and
potential fire or explosion hazard.

ASSEMBLY OF THE BIKE
8
1: Hex key
2: Wrench
3: Battery key
4: Pedal
5: User manual
1
2
3
4
5
3.1. Components in the Box
3. Assembly of the bike

ASSEMBLY OF THE BIKE
9
3.2. Bike assembly Instructions
3.2.1. Handlebar Assembly
1. Remove the 4 cap nuts, 4 bolts, and the handlebar clamp one
by one.
2. Place the handlebar in the correct position and align it so
that the triangle mark engraved on the handlebar is in line
with the top face of the clamp.

ASSEMBLY OF THE BIKE
10
2. Assemble the handlebar clamp and insert the 4 bolts M5xL20
by hand. Use the hex key (1) to tighten the bolts in the following
sequence: 1>3>4>2.
- Standard tightening force: 6.0 - 8.0 Nm.
3. Reinstall the 4 bolt caps.
2
3
1
4

ASSEMBLY OF THE BIKE
11
3.2.2. Pedal Installation
1. Choose the pedal with the "L" mark on the spindle to install
on the left side of the bike, according to the direction of the
rider. Use your hand to thread the pedal into the crank, and
then use the wrench (2) to tighten the pedal securely.
- Standard tightening force: 30 - 40 Nm.
2. Similarly, choose the pedal with the "R" mark on the spindle
to install on the ri
ght side of the bike, according to the direction
of the rider. Use your hand to thread the pedal into the crank,
and then use the wrench (2) to tighten the pedal securely.
- Standard tightening force: 30 - 40 Nm.

ASSEMBLY OF THE BIKE
12
3.3. Removing and Installing Lithium-ion Battery
⚠ WARNING!
Press and hold the power button on the battery for about 3 seconds until the LED light blinks before removing or installing
the battery on the bike. Refer to the detailed information on the warning label attached to the battery.
3.3.1. Installing the battery on the bike
1. Secure the bike and have the operator stand on the right
side of the bike in the opposite direction of the battery lock.
2. Hold the battery pack with both hands and insert the battery
tail into the slot.
3. Align the grooves and slots on the battery pack with those
on the lock.
4. Use your left hand to support the lower part of the battery
pack, and use your right hand to push the battery head into
the locking mechanism in the direction of the arrow from
the outside in. When you hear the "click" sound, it indicates
that the battery is fully engaged.