Populo CURVE User manual
CURVE 20” Foldable Electric Bicycle
User Manual
Please Read Before Operating Your NEW Electric Bicycle.
GENERAL SAFETY
SPECIFICATIONS
PRODUCT OVERVIEW
ASSEMBLY
BATTERY AND CHARGER
BATTERY LOCK/REMOVAL
DISPLAY
DISPLAY SETTINGS
HOW TO RIDE
FOLD YOUR BIKE
MAINTENANCE AND SERVICE
TROUBLESHOOTING
WARRANTY
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04
05
06
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TABLE OF CONTENTS
01
WARNING! It is your responsibility to comply with all trac related laws and to use proper equipment.
This includes appropriate cycling attire and bike maintenance.
Observe all local bicycle trac laws and regulations.
Observe regulations about bicycle lighting, licensing riding on pavements/sidewalks, bike path and trail
use, helmet laws, child laws relating to cycling, and special bicycle trac laws, it is your responsibility to
know and obey your local laws.
Always wear a certified helmet that has been properly fitted to the size of your head when operating any
type of mobility product.
Unless otherwise stated, a rider’ s weight and luggage should not exceed 120kg（264lbs）.
Before you ride your bike, always check to make sure everything is working properly and correctly
aligned.
Be familiar with the controls of your bicycle, such as brakes, pedals and shifting etc..
Keep all body parts or any obtrusive objects away from the sharp chainrings when pedaling. Failure to
wear proper attire could lead to injuries.
While riding, remember you are sharing the road or path with others. i.e. motorists, pedestrians and other
cyclists.
Always be a defensive rider. Always assume that others do no see you and expect the unexpected
Always be aware of your surrounds. Be alert and responsive to:
1)Motor vehicles of all types and in all directions.
2)Unexpected movement of obstacles.
3)Nearby pedestrians.
4)Children or animals in the area.
5)Imperfections of bike paths or paved roads including potholes, uneven surfaces, loose gravel, construc-
tion and debris.
6)Warning, hazard and yield signs.
Ride in designated bike lanes when available and always ride in the direction of trac.
Acknowledge and stop at ALL stop signs and trac lights.
When coming to a complete stop, look both ways at street intersections before continuing onward.
Use ocial hand signals for turning and stopping.
Do not ride with headphones.
Do not carry a passage.
Never hold onto another vehicle.
Do not weave through trac or make unexpected moves or turns.
Rules that govern the right-of-way for motorists apply to cyclists. A bicyclist should always be prepared to
yield.
Do not ride while under the influence of alcohol or drugs.
Avoid riding in bad weather when visibility is obscured, for examples dawn, dusk, or in the dark such
conditions increase the risk of accident.
WET WEATHER RIDING
Warning! Wet weather impairs traction, braking and visibility for bicyclists and other motor vehicles sharing
the road. During wet conditions, the risk of an accident is dramatically increased. Under wet conditions, the
power and traction of your brakes (Note: Weather conditions aect other vehicles sharing the road) are
dramatically reduced, under such conditions, it is harder to control your speed and easier to lose control. To
make sure that you can slow down and stop safely in wet conditions, ride slowly and apply your brakes
earlier.
GENERAL SAFETY
02
Cyclists should exercise extra caution when riding at night. Bicyclists are very dicult for motorists and
pedestrians to see in the dark and in many cases, night riding can be more dangerous than day riding.
Individuals of an appropriate age who are aware of the increased risks should take extra care when
riding at drawn, dusk or at night. Please not that it is important to choose suitable apparel and special-
ized equipment when riding in unfavoureable conditions to reduce the risk of injury.
Warning! Reflectors should not worn as a substitute for required lighting. Cyclists are near to invisible
for other cyclists and motorists if the necessary lights and reflective gear are not used. If you ride at
night, take all required precautions to make yourself visible through the sue of lights and reflectors. Lack
of adequate lighting measures may result in serious injury or death. As a moving cyclist, reflectors are
designed to reflect o of car and street lights to help you become more visible and recognizable when
riding.
Caution! Reflectors and their mounting brackets should be checked regularly to ensure they are clean,
straight and securely mounted. Check to be sure you comply with all local laws about night riding. The
followings are recommended.
It is important you take steps to enhance your visibility by wearing light-colored, reflective clothing
and accessories. There are plenty of proper reflective gear option that can be worn:
Vests, armbands, leg bands, stripes on your helmet, and blinker attached to your body and or bicycle.
Make sure your clothing or miscellaneous items do not obstruct the visibility of your reflectors and
lights.
Make sure that your bicycle is equipped with reflectors for riding at dawn, dusk or at night.
Always ride slowly when riding at night.
RIDING SAFETY
Populo Curve Foldable Electric Bike is designed for paved roads only. Do not attempt to perform jumps,
stunts or any other tricks that are outside of the parameters of transport means. The misuse of your
bicycle could severely aect the performance of the components and could cause potential injury.
To prevent an accident, take care to correctly measure the size of the bike in proportion to the size of
your body. Failure to evaluate such measurements may cause you to lose control of the bike and result
in injury.
Make sure the saddle height to fit, check and ensure the saddle and seatpost have been securely
clamped. A correctly tightened saddle will not allow any saddle movement in any direction.
Adjust the stem and handlebars to proportion fit you body type.
Adjust brakes to personal preference, brakes should be easy to reach, comfortable to grasp and
powerful enough to quickly bring your bike to a complete stop.
Prior to your first test ride, familiarize yourself with all functions, features and operations of your new
bicycle.
Before riding your bike and to prolong the lifetime of you rims, it is important to ensure that they are
kept clean and undamaged along the braking surface. It is advised to periodically inspect your rims for
excessive wear.
Always check that the saddle and handlebar stems are parallel to the bike’ s centerline. Correct
saddle and handlebar steams should be clamped tight to prevent them from moving out of alignment.
It is recommended to check that the grips are secure and in a good condition. A properly fitted
handlebar grips should not exhibit excessive movement.
Caution: Populo is not reliable for accidents, injuries or product malfunctions that result from any
unauthorized changes, modifications or tempering with any part of original specifications.
NIGHT RIDING
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Model Name Populo Curve
Max. Load Capacity 264.lbs. / 120 kg
Max. Speed (Throttle-Only) 20mph / 32km/h
Motor 36V 250W Brushless Hub
Battery 36V 237.6Wh Li-ion
15 Miles / 24Km
Wheel Size 20 x 2.20" Front / Rear
Wheel Inflation
Max. Load for Rack 55lbs / 25kg
Lights Front / Rear
Charging Rating 42V 2A
Charging Time Approx. 4 Hours
Water Resistance IPX4
Unfolded Dimensions 64.57” x 23.43” x 48.03” / 1640x595x1220mm
Folded Dimensions 38.58” x 19.76” x27.56” / 980 x502x700mm
Weight 47.3 Lbs / 21.5kg
SPECIFICATIONS
* Range Per Chager is measured under the conditions that power is sucient, with a 75kg load, at
86°F(30°C), 70% humidity, on a level road, in pure electric riding mode. Actual results may vary
based on dierences in temperature, load, wind speed, road conditions and other factors.
Range Per Charger (Pure-electric
mode)*
Max Inflation to 40 PSI(280KPA), Max Load
75kg(165 Lbs)
PRODUCT OVERVIEW
The Populo Curve eBike is a compact, Eco-friendly with Zero emissions, personal transportation device that
feels. Like a bike but rides like a moped.
CURVE 20” Folable Electric Bicycle
User Manual
Please Read Before Operating YourNEW Electric Bicycle.
CHARGING
PORT/BATTERY
ON/OFF SWITCH HUB MOTOR
REAR WHEEL
FRONT WHEEL
SEAT CLAMP
STAND KICKSTAND
PEDAL
SEAT
REAR BRAKE
HANDLE CLAMP
STEM
THROTTLE
DISPLAY
FRONT BRAKE
HEADLIGHT
LATCH
SUSPENSION
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BELL
SHIFTER
RACK
WHAT’ S IN THE BOX
1 x Populo Curve eBike
1 x Battery Charger
2 x Battery Lock Keys
1 x Owners’ Manual
Populo Curve Foldable Electric Bicycle is designed and simplest assembly without the aid of any tools.
You can straight take it from its package and quick to setup by following below steps.
ASSEMBLY
Step 1 – Unfold the rear wheel/section and keep your eBike upright with kickstand. While holding the
latch lock up, push the latch closed, make sure the hook end of the latch is secure and let the latch lock
turn down into the latch to lock everything in place.
Step 3 – Release the clamp under the handlebar, pull the handlebar up or push it down to adjust height as
your desired, then close the clamp to secure handlebar in place.
Step 2 –Pull the stem upright and fold the latch up to close it.
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NOTE: Position the seat at the right height is key for better pedaling, safety and overall comfort. The rider’ s
leg length is used to determine the seat’ s position. When pedaling, your hips should remain level and your
legs should not over-extend. To determine the right seat height, sit on the eBike with pedal at its lowest
pointand place the ball of your foot on the pedal. If you knee slightly at this position, the seat at the right
height. Additionally, when placing your heel on the pedal, your leg should be nearly straight.
Step 4 – Open the clamp under the seat post, insert the seat post into the frame fully and head of the seat
is parallel with the frame, and set it to a height which fits for the rider then close the clamp to secure the
seat in place.
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Step 5 – Holding the crank arm vertical, fold or unfold the pedal, repeat with other pedal as needed.
Now your new bicycle is fully setup.
BATTERY AND CHARGER
Charging Instructions
Note: Charge the eBike before using it.
Note:
Fully charge the battery before first use.
Recommend charging the battery o the bike indoors, in moderate temperature conditions.
Perform periodic visual inspection of the battery ports and charging cables.
Keep your charging environment clean and dry at all times.
If the charging port is damp or has any liquid on it, do not charge your eBike.
In order for the battery to operate at maximum eciency, avoid charging your eBike in extremely hot or
extremely cold environments.
Do not under any circumstances, use the bike while it is charging or connected to charger.
The charging time is approx. 4 hours, over charging may aect battery life or performance. If the
charging adapter’ s light does not turn on, it may not be fully connected, check that it is securely
connected to the wall and to the eBike.
Always use the charger provided with your Populo Curve eBike ONLY, if you have lost or misplaced
your charger, contact Populo customer support to obtain a replacement.
After many charging and discharge cycles, runtime and range will be reduced.
Battery USB output Port
The battery is designed with a standard 5VDC 1 Amp USB output port for charging of other devices such
as mobile phone, pad etc.
Make sure the eBike is turn o. Open the cap, plug the charger into the charging port, then plug
the other end into an AC wall outlet.
The charging adapter’ s light will turn red during charging then turn green once the battery is fully
charged. Disconnect all cables once charging is finished.
For your convenience, the battery can also be charged while detached it from Populo Curve eBike.
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For your convenience, the Populo Curve’ s battery can be removed and locked as needed, fold the
bike before unlocking and/or removing the battery.
BATTERY LOCK/REMOVAL
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Step 1. Use the included keys to unlock the battery
through the keyhole inside the folded frame, to
unlock the battery, insert the key and turn it to the
unlock position.
Step 2. Hold the nylon strip on the battery and
use it to pull the battery out.
Step 3. To reinstall the battery, re-insert it into
the frame, turn the key to the locked position.
Note: Remember to lock the battery and remove the key bfore unfolding and/or riding the eBike.
Always keep the keys well, do not lose them.
OPEN
LOCK
DISPLAY
Display Information
The display on the Populo Curve features several dierent elements.
Quick-press to adjust power-assisted level from lower to high (1-5), press and hold for 1 second to
switch the lights on and o.
Press and hold for about 2 seconds to turn the display on/o. Quick-press to cycle between TRIP,
VOL, TI and ODO on display.
Quick-press to adjust power-assisted level from high to lower (5-1).
BATTERY LEVEL: This icon indicates how much battery life you have left.
Less bars less battery capacity.
ODO: These numbers show odometer data, i.e., cumulative distance from 0
to 99999mi. Data accumulates in increments of 1 mi. if a single trip is less
than 1 mi, it is not included in the total mileage. When data exceeds the
maximum (99999mi), the odometer will automatically reset to zero.
TRIP: These numbers show distance data for a single trip. Data is automati-
cally cleared when the bike is powered o.
VOL: These numbers show current voltage information.
TIME: These numbers show how long the power is on.
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SPEED: This icon shows a current riding speed as measured in mph or km/h.
Assist: This number shows the assist level (1-5)
Press and hold + and - buttons for about 2 seconds to enter the display setting screen, after your have
done the setting, the display will be back to normal mode after about 2 seconds.
Adjust display brightness: Press the power button to enter P01 Screen, the use + and – buttons to adjust
the brightness of the display’ s backlight.
Switch measurement Unit: Press the power button to enter P02 screen, then use + and – buttons to set
the display to the desired measurement type between imperial (miles, mph) and metric (km, km/h).
DISPLAY SETTINGS
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HOW TO RIDE
Warning!
You should wear an approved bicycle helmet every time you ride a bicycle, regardless of the legal
requirement to do so. Additionally, some jurisdictions require helmet use when riding Class III eBike, you
should comply with local law when riding your bicycle.
Always Inspect gears, examine brakes and check tire pressure before riding. Proper tire inflation can
reduce flats and improve performance, including travel distance per charge.
This Populo Curve Electric Bicycle is designed with 3 dierent riding modes of Pure Electric,
Power-assisted as well as Pedal mode.
Start your eBike by pressing and holding the power button on the display for 2 seconds, or ride it with
your feet directly. Before you ride with pure electric mode, you need to set power-assisted level to be at
least level 1 ( power-assisted level 0 will not activated to throttle)
Move forward by pressing the throttle down.
Switch between 6 gears by rotating shifter on the right handle bar.
To stop, release the throttle, then squeeze the front and rear brakes to slow the front and rear wheel
down.
FOLD YOUR BIKE
The Populo Curve can be folded to get it more compact size when not ride for storage, transportation.
To fold your eBike by following below steps.
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1. Holding the crank arm vertical and fold the pedals.
2. Open the clamp under the seat post and push the seat down.
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NOTE: Make sure that the ON/OFF power switch near to charging port on the battery is "ON"
before you turn display on or ride.
MAINTENANCE AND SERVICE
Properly maintaining your Populo Curve eBike ensures it has longevity and smooth operation.
When cleaning your bike, use a damp cloth and gentle dish soap. Note: Do ot use a pressure washer or
sprayer.
Periodically apply a light lubricant to moving parts. Including the links of the chain, derailleur pivots, and
shifter cable inner wire where it enters the cable housing.
If you ride in wet/humid environments clean and dry electric connections and apply an anti-corrosive.
All bicycles will need a tune-up or adjustments by a professional. An annual check-up is beneficial, your
bike’ s service schedule will depend on the frequency of its use in between services.
Keep tires inflated to their recommended pressure (30-40PSI/2.07-2.75BAR/200-280KPA) and check
before each ride.
Clean the drivetrain and lubricate the chain monthly.
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3. Release the latch by pulling it down away from the stem, the slide to the left side (see below illustrations)
then fold the stem down.
4. Holding the latch lock up, use your other hand to open the latch by pulling it away from the frame,
folding the rear wheel/section towards the other wheel and use the stand under the frame as needed.
TROUBLESHOOTINGS
21 Current Error
Current Limit Exceeded or
Damaged Cable
22 Throttle Error
Damaged Throttle Cable or
Throttle Hall Sensor
23 Motor Phase Error
Damaged Motor Phase(s) or
Damaged Controller
24 Motor Hall Sensor Error
Motor Cable Not Connected
or Damaged Motor Hall Sensor
25 Brake Error
Loose Brake Switch or Brake
Has Been Engaged for More
Than 5 Seconds
26 Overheat Protection
Overheated Due to Heavy
Use
Code Error How to Resolve
1.Stop riding and let the bike cool down for.2 minutes
to see if the error code disappears. If the error code
persists, check to confirm that the motor and controller
cables are properly connected, also check cables for
damage or wear and tear on the connectors.
2.Check if the motor runs normally on a dierent
controller, then replace the controller on the aected
bike. If the motor does not work with the known-good
working controller, then replace the motor.
When you press and release the throttle, it should
return to the original position. Remove any obstruc-
tions. Check the throttle and throttle cable for
damage, such as a cut or frayed cable. If this fails to
resolve the error code, replace the throttle assembly.
Check the cable that connects the rear hub motor to
the rest of the system and make sure it is free from
grit or contaminants and is firmly connected. This
error might appear if you don’ t reconnect the cable
after removing the rear wheel (for example, after
changing a flat tire.) At least one of the motor phase
wires has been damaged or is disconnected. If
checking the connection does not resolve the error,
replace the motor; replace controller if a new motor
doesn’ t solve the issue.
If you have confirmed that the motor cable is properly
connected, service or replace the rear hub.
The level uses a special brake levers that stop the
motor when you apply the brakes – built in “Mechani-
cal Switches” disengage the motor’ s power when the
lever is squeezed, if the lever is damaged ( for
example, following a crash), it might need to be
replaced.
Turn o the bike, allow the components to cool, then
try again to see if the error code disappears. If this
does not resolve the issue and the error code remains
even when the bike is cool, replace the controller.
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Remove the bike from the obstacle, power o, and
power on again to resume riding.
Check all cable connections between the controller
and the display and that the connectors are
undamaged and not contaminated with grit. If this
does not resolve the issue, replace the display. If the
bike does not work correctly with a new display,
replace the controller.
Use the display to view the real-time voltage being
output from the battery to confirm it is correct. It can
also be checked at the battery terminals using a volt
meter. If the battery is old and has been charged/dis-
charged many times. It may need to be replaced.
Confirm all cables are connected, then test the bike
by using walk mode. If the motor works when using
walk mode, but not pedal assist, replace the cadence
sensor found under the left-side crankarm.
27 Motor Lock Protection
Hub Motor
Encounters Resistance
30 Communication Error
Controller Has No or Poor
Connection to Display
38 Battery Voltage Error
Low Voltage from Battery or
Wrong Battery
NO CODE No Pedal Assist
Damaged Cadence Sensor
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LIMITED ONE YEAR COMPONENTS WARRANTY
Includes: forks, stem, handlebar, seat post, saddle, brakes, cables, disc rotors, bottom bracket, crankset,
pedals, chain, rims, spokes, wheel hub, freewheel, cassette, shifter, motor, throttle, controller, wiring
harness, kickstand, reflectors and hardware, These items are warranted to be free from manufacturer
defects in materials and/or workmanship for a 1 year period from the date of original purchase.
LIMITED ONE YEAR BATTERY WARRANTY
Lithium Ion battery are warranted to be free from manufacture defects in materials and/or workmanship for
a 1 year period from the date of original purchase（cycle life or deep charge up to 70% full capacity）.
LIMITED 30 DAYS FULL REPLACEMENT WARRANTY
IF an Populo Curve bicycles is not working properly because of a major defect within the first 30 days,
Populo will repair or replace any defective Populo bike at its sole option and expense upon determining
whether the damage, failure, or loss is due to a major defective. Populo will have sole discretion to
determine whether the damage, failure, or loss is due to a major defect or otherwise.
TERMS OF WARRANTY
This warranty only applies to the original owner of the Populo Curve bike.
Proof of purchase is required for all warranty claims.
This warranty is replacement parts ONLY and does NOT cover the cost of labor.
Thais warranty covers does not cover any damages or defects resulting from failure to follow instruction
in the owner’ s manual, acts of God, accident, misuse, neglect, abuse, commercial use, modification, or
improper assembly.
This warranty does not cover parts damaged by an attempted repair unless performed by an authorized by
an authorized dealer of Populo with Populo’ s knowledge.
Populo reserves the right to refuse any warranty claim.
WARRANTY
16
LIMITED ONE YEAR COMPONENTS WARRANTY
Includes: forks, stem, handlebar, seat post, saddle, brakes, cables, disc rotors, bottom bracket, crankset,
pedals, chain, rims, spokes, wheel hub, freewheel, cassette, shifter, motor, throttle, controller, wiring
harness, kickstand, reflectors and hardware, These items are warranted to be free from manufacturer
defects in materials and/or workmanship for a 1 year period from the date of original purchase.
LIMITED ONE YEAR BATTERY WARRANTY
Lithium Ion battery are warranted to be free from manufacture defects in materials and/or workmanship for
a 1 year period from the date of original purchase（cycle life or deep charge up to 70% full capacity）.
LIMITED 30 DAYS FULL REPLACEMENT WARRANTY
IF an Populo Curve bicycles is not working properly because of a major defect within the first 30 days,
Populo will repair or replace any defective Populo bike at its sole option and expense upon determining
whether the damage, failure, or loss is due to a major defective. Populo will have sole discretion to
determine whether the damage, failure, or loss is due to a major defect or otherwise.
TERMS OF WARRANTY
This warranty only applies to the original owner of the Populo Curve bike.
Proof of purchase is required for all warranty claims.
This warranty is replacement parts ONLY and does NOT cover the cost of labor.
Thais warranty covers does not cover any damages or defects resulting from failure to follow instruction
in the owner’ s manual, acts of God, accident, misuse, neglect, abuse, commercial use, modification, or
improper assembly.
This warranty does not cover parts damaged by an attempted repair unless performed by an authorized by
an authorized dealer of Populo with Populo’ s knowledge.
Populo reserves the right to refuse any warranty claim.
www.populo.com
THANK YOU FOR CHOOSING
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