DYU FF500 User manual

DYU SMART ELECTRIC BIKE FF500
INSTRUCTION
Do not use the eBike without reading this manual carefully and
knowing your eBike thoroughly
Please save this manual for future reference

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PARTS & COMPONENTS
2× Pedals 1× Charger 1× Owner’s
Manual
1× Warranty
Card
1× Hex Key 1× 15mm
(or 0.59 inch) Spanner
In the Package
1.Brake lever
2.Wire
3.Folding Tube
4.Shifter
5.Bell
6.Display
7.Power Button
8.Grip Cover
9.Throttle
10.Front Light
11.Mud Fender
12.Front Fork
13.Front Wheel Reflector
14.Front Wheel
15.Front Disc Brake Caliper
16. Mudguard Stay
17.Battery
18. Frame Latch
19.Controller
20. Chain Wheel
21. Crank
22.Chain
23.Kickstand
24.Rear Wheel
25.Derailleur
26.Rear Disc Brake Rotor
27. Rear Disc Brake Caliper
28.Rear Wheel Reflector
29.Rear Mud Fender Support
30.Rear Mud Fender
31.Rear Frame
32.Seat Tube Quick Release
33.Shock Absorbing Tube
34.Saddle
Installing the PedalsBattery Removal
Screw in the right pedal
clockwise, and the left counter
-clockwise.
Turn the key clockwise
Battery pops up Take out battery

Charging Port
Left Brake Lever
Shift Mode “+”/
Headlight Button
Power Button/
Function Button
Shift Mode “-”/
Walking Mode
Display Mechanic
Shifter Electric
Shifter
Right Grip Cover
Left Grip
Cover
Right Brake Lever
Bell
GETTING STARTED
1.Assembling: 1) Open the box, take out your eBike,
and remove the packaging. 2) Mount the front
wheel to the front fork, and tighten the screws to
lock into place. 3) Assemble and align the handlebar
upon the riser, and lock into place. 4) Walk the eBike
to ensure no abnormal sound from the turning
wheels. Gently pull the brake levers for a couple of
times to ensure both the front and rear brakes
function normally. 5) Adjust the seat tube to desired
height, and lock the quick release. 6) Install the
pedals and tighten up. (Please wear a helmet when
riding the eBike.)
2.Charging: Connect the DC jack of the original
charger to the charging slot of your eBike, and the
AC plug to the mains. The charger light turns from
red to green when charging is complete. (Please do
not charge your eBike indoors. For outdoors
charging, please avoid rain and strong direct sun
over the charger.)
3. Power on and off: Locate the power button on the
left handle. Press “M” to power on and the display
shall turn on as well. Press again to power off.
4. Headlight: Locate the light switch at the left
handle. When power is on, press “ ” button
and hold it for three seconds to switch the headlight
on and off.
5. Walking Mode: Locate the button “ ” at
the left handle. Press and hold it for three seconds
to activate the Walking Mode which maintains a
riding speed of 6 km/h (or 3.73 mph). To disable the
Walking Mode, press the button again, or pull the
brake levers.
6. Shifting mode (motor speed): Locate the switch
button on the left handle. Press “ ”shift
the motor speed. Mode 1/2/3 corresponds to the
motor-powered maximum speed of 15 km/h (or 9.32
mph), 25 km/h (or 15.53 mph) and 32 km/h (19.88
mph).
7. Display: The display in the center of the
handlebar shows battery level, speed, mode,
mileage, lights and failure report.
8. Riding modes:
a. Sports Mode: Power is off and there is no motor
output. Pedal and exercise.
b. Throttle Mode: When the power is on, twist the
throttle to accelerate and start the ride without
pedaling.
c. Pedal Assist Mode: When the power is on and
while you are pedaling, the motor also provides
power for an easier and more energy-efficient ride.
9. Power cut-off brakes: When you pull the brake
levers, the controller cuts off the motor output. The
mechanical disc brakes are also engaged. As long as
the brake levers are not completely released, Pedal
Assist Mode or Throttle Mode remains disabled.
10. Removing and installing the battery: This
battery is removable. To remove it, open the battery
lock, turn the clip, pull downward to reveal the
upper part of the battery first before pulling the
entire battery out. To install the battery, start with
the bottom of the battery, slide it in through the
battery tube, push in the upper part, turn the clip,
and lock the battery. (For battery replacement upon
damage, please contact our official customer
service.)

INSTALLING THE FRONT WHEEL
Installing the Front Wheel
I. Basic mechanical principle with the hub and anchor nuts
Turn the anchor nuts clockwise to increase clamping, and anti-clockwise to decrease.
II. How to install
1. Manually turn the anchor nuts anti-clockwise to loosen for space, and insert the front
wheel all the way into the dropouts of the front fork.
2. Manually turn the anchor nuts clockwise to fasten up. Ensure that the front wheel is located at
the very center of the front fork, and that the disc brake rotor is parallel to the disc brake caliper
towards the end of the front fork with space in between. Keep some space on both sides, and
tighten into place with a spanner as indicated below.
Correct Wrong

GEARS
DERAILLEUR SYSTEM
Some DYU eBikes come with gears, which consists of:
• Rear sprocket cluster, called freewheel or cog set
• Rear derailleur
• Shifter
• Control cable
• Front sprocket, called chaining
• Drive chain
The gear mechanism differs in ergonomic design, performance and price.
A downshift is a shift to a lower or slower gear, which makes pedaling easier. An upshift is a shift to a
higher or faster gear, which makes pedaling harder. In practice, you can upshift to go faster, and you can
downshift to go uphill.
A shift is possible only when you are pedaling forward, i.e. the drive chain is moving forward and under
some tension.
CAUTION
Never shift when pedaling backward. Also, do not pedal backwards after a shift. Either action may jam the
chain and cause serious damage to your eBike.
The derailleur system includes front and rear derailleurs,
shift levers, and derailleur control cables. For smooth
shifting, all components must function properly.
Although the front and rear derailleurs are initially
adjusted in the factory, you need to inspect them before
each ride.
To begin, twist the shifter to the largest number indicated,
and the cable shall loosen the anchor bolt on the rear
derailleur, placing the chain on the smallest sprocket.
Adjust the high limit screw so that the guide pulley and the
smallest sprocket are lined up vertically. Re-tighten the
cable, pull out any slack, and re-tighten the anchor bolt
securely. Shifting through the gears, making sure that
each gear is achieved quietly and swiftly.
If necessary, use the barrel adjuster to fine tune the cable
tension by turning it the direction you want the chain to go.
For example, turning clockwise loosens cable tension and
moves the chain away from the wheel, while turning
counter-clockwise tightens cable tension and direct the
chain towards the wheel.
Freewheel
Pulley
Adjustment
Screw
Guide
pelley
Tension
Pulley
Adjustment
Screws
Cable Barrel
Adjuster
Rear Derailleur
Side View
Barrel
Adjuster
High Gear
Adjustment
Screw
Low Gear
Adjustment
Screw

DISPLAY
Item
Headlight
Multi-functions
Display
Current speed
Current battery
level
Failures
The icon lights up when the
headlight is on, and off when
the headlight is off.
Total mileage
Mileage of a single ride
Battery voltage
Working current
Time lapse
Current speed
Walking Mode
Cruising
Riding modes
Current battery level
E02: Abnormal braking
E06: Battery undervoltage
E07: Motor failure
E08: Throttle failure
E09: Controller failure
E10, E11:
Abnormal communication
Current mode
Display Sample
Image Description

BUTTONS
Item
“M” button
Up button
Down button
Power on/off when press up
to three seconds
Press to gear up, and hold to
turn the headlight on and off.
Press to gear down, and hold to
activate the Walking Mode.
Image Description
Display Setting
Press and hold both the Up and Down buttons at the same time to open the
setting menu. Once on the menu, press the Up or Down button to respectively
increase or decrease the value. Press M button to shift the value.
To save a setting and exit the setting menu, press and hold both the Up and
Down buttons at the same time. The setting times out and saves automatically
after eight seconds of inactivity.
P01 is for the brightness of the display, which increases from level 1 to level 3.
P02 is for the unit of mileage, with 0 for km and 1 for mile.
P16 is to clear mileage. Press and hold the Up button for ten seconds to set the
mileage back to zero.

SPECIFICATION
Model
Body material
Expanded size
Packing size
Wheelbase
Pedal ground clearance
Wheel hub
Body Color
Weight
Load
Average speed
Max design speed
Range in throttle mode
Range in pedal assist mode
Hill climbing capacity
Operating temperature
IP rating
FF500
Aluminum alloy
1760*585*1270 mm (or 69.29*23.03*50 inches)
1515*310*720 mm (or 59.65*12.20*28.35 inches)
1150 mm (45.28 inches)
120 mm (or 4.72 inches)
16 inches
Blue
31 kg (or 68.34 lbs.)
75kg (or 165 lbs.)
25 km/h (or 15.53 mph)
32 km/h (or 19.88 mph)
1.08 kWh
55±5 km (or 34.18±1.86 mi)
65±5 km (or 40.39±3.11 mi)
15 degrees
IP54
Power consumption
per hundred kilometers
-10~45 degrees Celsius
(or 14-113 degrees Fahrenheit)
Build
Performance

SPECIFICATION
Core
Features
Model
Battery type
Battery capacity
Battery rated voltage
Charging voltage
Charger input voltage
Charging time
Motor type
Motor rated power
Motor rated speed
Motor rated voltage
Controller under voltage value
Controller over current value
FF500
18650 lithium-ion
14Ah
48V
DC54.6V
AC100-220V
7-8 hours
In-wheel high speed motor
500W
340 r/min
48V
41V±1V
18A
Headlight
Rear light
Cruise
Speed sensor
Adjustable seat height
Braking
Customized stickers
Yes
Yes
Yes
Yes
Yes
Front and rear disc brakes
Optional
Note: The max speed may vary, depending on the battery level, load, tire pressure, terrain, lubrication state of the chain and bearings, etc.
The ranges are determined upon tests at the ambient temperature of 25°C (or 77°F), at the speed of 15 to 20 km/h (or 9.32 to 12.43 mph), on
smooth and firm terrain, with a load of 75 kg (or 165.35 lbs.), and within an uninterrupted period from full to zero battery level. The ranges may
vary, depending on your riding behavior, ambient temperature, load, tire pressure, terrain, etc.

Left Power Cut-off Brake Lever
Right Power Cut-off Brake Lever
High
Speed
Motor
Booster
Controller
Power Button
Headlight
5V
Phase Wire A
Ha
Hb
Hc
GND
Phase Wire B
Phase Wire C
GND
5V
Hall2
GND
GND
Brake
GND
Brake
GND
Power_48V
Display
48V Battery Pack
DC2.1
Charging Port
48V
GND
Y-GND
48V Electrolock
Speed Sensor
K1
K2
Switch
Switch +
Switch ‒
Electrolock
_48V
Power_48V Power_48V
Electrolock
_48V
Electrolock
_48V
RX
TX
TX
RX
CIRCUIT DIAGRAM

ATTENTION
Battery & Charging
● Do not connect the positive to negative, or vice versa. Do not damage, disassemble, or short-circuit the
battery. Avoid water, other liquid, or other foreign matter inside the battery to prevent short circuit.
●Instructions in this manual must be followed when charging the battery, otherwise the owner shall take sole
responsibility for any consequences.
● Charge the battery only at the temperature between 0°C (or 32°F) and 45°C (or 113°F), and discharge at
the temperature between -20°C (or -4°F) and 60°C (or 140°F). The charging current should not exceed 2A.
Charge only in a well-ventilated area, away from sun and heat.
● Use the original charger from the package to charge the battery. Connect the charger and battery before
plugging the charger into the mains. Do not charge the battery for over 6 hours each time.
●When charging, if the charging indicator appears abnormal, a smell is released, or the charger overheats,
stop charging immediately. Service or replace the charger.
● To stop charging, unplug from the mains before disconnecting the charger and battery.
● When the charging indicator turns green, stop charging.
● Do not leave the charger connected to any AC power source when not charging.
●When not in use, store the battery in a dry (relative humidity at 65±20%) and cool (temperature at 10-35°C,
or 50-95°F) place. Keep away from fire, heat and high temperature. Do not put the battery in acid or alkaline
liquid. Make sure to charge the battery for two hours each month.
● Before using the charger to charge a different battery, note the battery type and voltage that the charger
may apply to.
● It is advisable not to carry the charger with your eBike. If you must, place the charger in a toolbox upon
shock absorption treatment.
● Do not dissemble the charger or replace the parts and components in the charger on your own.
● Waste battery is classified as hazardous. Do not dissemble the waste battery on your own. It should be
collected and recycled properly.
Riding your eBike
● Do not use the eBike before reading this manual carefully and knowing your eBike thoroughly.
● This eBike is designed for riders aged 16-45. Anyone aged below 16 is strictly forbidden to ride this eBike.
● Please wear a helmet.
● Do not lend your eBike to anyone who do not know how to use it, so as to avoid harm.
● When adjusting the steerer tube and seat tube, do not expose the minimum insertion marks.
● Before riding, check the tire pressure. It is advisable to maintain at 35-45 PSI.
● Before riding, ensure the power, lights, handles, brakes, wheels, reflectors and others are in good condition.
● Before carrying people or objects on your eBike, learn the local laws and regulations, and abide by them.
● Do not exceed the load capacity of 120 kg (or 264.60 lbs.).
● Wear a helmet, and obey traffic rules.
● Obey local traffic rules to keep to the right or left.
● Do not ride on any motorized lane or in any pedestrian crowd.

ATTENTION
Maintenance
● The front and rear wheels should be aligned to the center of the front fork and frame.
● Park away from direct sunlight and rain.
● Do not rinse the eBike. Wipe with a damp cloth to clean.
● Check the motor and brakes frequently. Do not oil the braking system.
● Regularly check all screws and keep them fastened.
●Recommended torque specs: handlebar screw 60-80 kgf.cm (or 52.08-69.44 lbsf.in), steering stem screw
175-200 kgf.cm (or 151.90-173.60 lbsf.in), saddle screw 175-250 kgf.cm (or 151.90-217.00 lbsf.in), and wheel
screw 320-450 kgf.cm (or 277.70-390.60 lbsf.in).
● Regularly check the tension of the chain, which can be adjusted via the chain regulator.
● Frequently check the tires for scratches, cracks or excessive wear. The inner tube and valve should be
perpendicular to the wheel hub. Punctured, damaged or excessively worn inner tube and tire must be replaced
immediately. Please contact professional technicians.
● It is forbidden to modify key structural parts including the frame, front fork and steerer tube, and any
electrical parts. If damaged, replace with identical parts from our factory. Otherwise, the warranty shall be void
and the owner shall take sole responsibility for any consequence.
Disclaimer
●Our company reserves the right to modify and give final interpretation to the product model, specification,
and other information contained in this manual.
● The functions of the specific model referred to in this manual apply to this specific model only.
●The product model, specification, and other information contained in this manual is subject to any modifica-
tion or change without notice.
● Without the prior written permission of the company, the contents of the manual may not be copied,
modified, reprinted, disseminated or published in any form.
●Please read this manual carefully before using the product, and operate in accordance with the manual.
Otherwise, the company shall not be liable for any personal or property damage, including damage to the
product, caused by misuse or abuse.
● For more information, please visit our official website: www.dyucycle.com.
●It is advisable not to go over 15 km/h (or 9.32 mph) when riding on any non-motorized lane, downhill, or
paved road.
● Slow down in rain or snow as required braking distances increase.
● It is advisable not to ride in storms or any extreme weather.
● Avoid impact on the motor.
● Keep the bearings lubricated.
● Do not park your eBike in any lobby, walkway, evacuation stairway, or emergency entrance/exit.
●Do not charge or park your eBike inside any residential building. Keep away from combustibles when
charging. Charging should not exceed 6 hours each time.

Manufacturer: Shenzhen DYU Intelligent Mobility Technology Co., Ltd
website：www.dyucycle.com
DYUEbikeOwnersGroup