YAMEE Fat Bear 750s User manual

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User Manual
Suitable for Yamee Fat Bear 750S

Yameebike.com

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CONTENTS
Part 1 Unboxing
Part 2 Display Instruction
Part 3 Common problems and Solutions
Part 4 Use and Maintenance
Part 5 After Sales and Warranty
P 1-5
P 20-24
P 16-19
P 6-12
P 13-15

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Part 1 Unboxing
(1) Frame Unfolding
Push the clamp to lock the frame solidly and make sure it is tight.
The Yamee ebike comes with 95% assembled.
Only three steps to unfold:

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(2) Handlebar
2. Push and lock the clasp. 3. Make sure the clasp is locked.
1. Turn the hinge upward until the handlebar is fixed.

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(3)Pedal
Unfold
Rotate the pedal up until the pedal is fully engaged.
Fold
To fold the pedal, push it from the front first, and then rotate it downward.

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(4) Battery Removal and Charging
When the charger light turns red, it means the battery is being charged; When the light
turns green, it means the battery is fully charged.
*Two ways to charge:
1. Remove the battery and charge.
Insert the key and rotate until the battery is released, then pull the key out to remove the
battery .
2. There is a charging access port behind the back of the bicycle's frame hinge. You can
charge directly through this charging port without having to remove the battery.

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(5) Transmission System
1.This function can only be adjusted while pedaling.
2. Depress this lever to shift to a higher gear.
3.Depress this lever to shift to a lower gear.

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Part 2 Display Instruction
I Display Interface

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（1）Press the “i” button to display different
information.
1.Miles traveled 2. Total miles traveled 3. Maximum speed
4.Average speed 5.Total traveled time

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（2）Driving Mode switching.
3.Sport Mode
Activates at a high speeds
providing high acceleration
( Higher energy consumption).
2.Normal Mode
Activates at a normal speeds
providing normal
acceleration ( Normal energy
consumption).
1. Eco Mode
Activates at a slow speeds
providing low acceleration
( Low energy consumption).

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1.Walk-assistance function may only be used when you
walking the E-bike.
2.To activate the walk-assistance function, press the
“-” button for 2 s.
3.The walk-assistance function will be switched off as
soon as you release the button.
（3）Switching Walk-assistance Mode On/Off
（4）Assistance Level Selection
1.Press "+" or "-" button to switch the E-bike system assistance level to
change the motor output power.
2.The default assistance level ranges from level“0”to level“3”.
3.The output power is zero on Level “0”. Level “1” is the minimum power.
Level “3” is the maximum power.
4.The default value is level “0”.

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The following functions must restart the display
after setting the instrument to take effect .
II Introduction of common functions
(1) Setting Access
1. press both the “+” button and the “-” button for 2s to access general
settings menu.
2. All the Settings are operated in this page.

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In case of the rider
change the settings and
then don`t remember
the default settings,
here are two images
for reference.
（2）Default Settings
（3）Password Setting
1.This setting means power-on password setting when you turn on the
display.
2 . After accessing the password settings, press the“+”or the“-”button to
adjust the number and then press the“i”button to confirm digit one by one
until the correct 4-digit password is completed.

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1. Cruise Control is to ride your bike at a
constant speed.
2. Press the“i” button to access the CRU
setting.
3. Press the“+”or“-”button to turn “off” into
“on” to activate the Cruise Control.
4. Press the throttle at a constant speed
you want for 5s. The bike will then
maintain this speed
5.
the energy consumption of the motor.
(4)Cruise Control
(5)Kinetic Energy Recovery
1. Turn on the power set, adjust to 0- 3.
2. And then turn the SHD function to 50 to start the energy recovery function.
3. When the speed reaches 15MPH going downhill, adjust the pas level to 0,
the kinetic energy can be automatically recovered, this will also happen during
braking.

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Part 3 Common problems and solutions
The battery cannot be charged, the display shows an abnormal battery
power.
Use a multimeter to check if the battery still has voltage.
Check if the charger indicator is normal. (Red light means charging,
green light means fully charged)
The battery case is damaged, stop using the battery and contact us.
The brakes make abnormal noise.
Adjust the brake pads or brake discs.
The rear wheel motor makes abnormal noise.
Lift the rear wheel off the ground and press the throttle to see if the
rear wheel runs. Then contact us with a video for further solutions.
The derailleur is pressed or the chain falls.
Try to strengthen or adjust the derailleur.
The ebike comes without keys.
The keys are hung on the wires in front of handle bar. Check the
wires in front of the handlebar and see if it falls into the box.

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When an error code appears on the display.
Error Code
Definition
21
Current Abnormality
22
Throttle Abnormality
23
Motor Abnormality
24
Motor Hall Signal Abnormality
25
Brake Abnormality
30
Communication Abnormality
Error code 21 and 30 indicates controller problem.
Error code 25 indicates brake problem. Do following steps to
confirm which brake is defective:
Unplug both brake wires to see if there is any error code shows on
the display.
Only unplug the front brake wire to see if an error code shows on the
display.
Only unplug the rear brake wire to see if an error code shows on the
display.
It appears that oil is leaking from the front fork.

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This is a normal phenomenon that occurs after a bicycle has been
used for a period.
Can people sit on the back seat?
The maximum load of the back seat is 25kg. It is prohibited to sit on.
Water leaks into the display.
Do not ride in heavy rain. Add protection to the display if you must
ride in rainy conditions. Warranty will not cover the display problems
caused by water damage.
Why the ebike comes with flat tire?
The tires will not be filled with air. Ride the bike after inflating the
tires. (The pumping range is 17-18 psi)
Can I refit the bike?
The bike can be disassembled and refitted. But our warranty will not
cover any bike problems after the refit.
Can I do some upgrades on the bike?
We provide upgrade service for some accessories. Contact Yamee
for more details.
I need to return the bike, what should I do?
We only accept returns with original package. Any returns without
original package will not be accepted.

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Part 4 Use and Maintenance
Battery Maintenance
Fully charge the battery for the first use.
Do not use the battery in low power level.
Must use the specified charger for charging.
Do not charge the battery at high temperature (over 212
Fahrenheit/100°C). Charge in a ventilated area.
If the battery is not in use for a long time, charge the battery at least
once a month to keep the battery active.
Keep the battery away from water or any other liquid.
Turn off the battery when it is not in use.
Fully charge the battery before each use. It will extend the battery
life.
If there are problems with the battery, do not charge it anymore and
contact us for further solutions.
Frame Maintenance
Frame maintenance is important. Wipe the bike dry if you’ve gotten
it wet during a ride.
Brake Maintenance
Check brake pads regularly.
Check the brake disc regularly to prevent deform.

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If it is a hydraulic brake, check regularly to see if there is any oil
leakage.
Clean the brake regularly.
Motor Maintenance
Do not try to disassemble the motor.
If there are any problems with the motor, contact Yamee with a
video.
Tire Maintenance
Check regularly to prevent air leak.
Check spokes regularly.
Derailleur Maintenance
Check the rear derailleur regularly to see if it changed to every gear
(contact us for the video about how to adjust the shifter).
Check the rear derailleur guard to see whether it has bent to affect
the derailleur or not.
Riding on Rainy Days
The ebike should not be used in rainy days.