2. When inspection is needed, it should be carried out in a safe place and pay close attention
to the surrounding environment.
3.If there is any abnormality during the inspection, please rectify the abnormality before
riding. If the problem is difficult for you to solve, please contact Surron or the local authorized
dealer.
CAUTION
1. The front and rear brakes are disc brakes. When the brake pads are worn severely, please
replace them as soon as possible.
2. Keep the disc brake system clean in daily basis use and avoid long-term adhesion of
sediment, especially oil pollution.
Check Operational Unit
1. Check if the suspension is bent, deformed, or damaged.
Check if the front fork is damaged, loose or oil leakage and other faults. Shake the handlebars
up and down to check whether there is any abnormal sound caused by the front fork fault. If
the front fork is malfunctioned, please contact Surron or the local authorized dealer.
2. Check Brakes
Check if the free space of the brake lever is within the specified range (15-30mm). Adjust If it
does not meet the requirements after measurement.
3.Check if the brakes function well. Please ride at low speed on dry flat road for inspection,
and use the front and rear brakes respectively to check their braking effective.
4. Check Tires
The tires will be damaged by glass, stones and other matter on the ground. Please pay
attention to the road condition when riding. Avoid riding in places where tires may be easily
damaged. In addition, you should often check if the tires have distinct cracks and other
damages.
1）Check the tire pressure with the tire pressure gauge when in the cooling condition.
2）Check if there are cracks, damages or abnormal wear.
3）Check if the spokes of the wheel are loose.
4）Check the tightness of the chain. Up and down 10-20mm.
5）Check the depth of tire grooves.
Check tire wear, groove depth. If wear reached 2/3 of the convex block, the tire should be
replaced. When there is abnormal sound or swing in the tire, please contact your local
authorized dealer for inspection and maintenance.
The pivot shaft nut locking torque should be 30 N·m, and the rear axle nut locking torque
should be 40 N·m, The front axle screw locking torque depend on the front fork.
CAUTION
1.The belt tension has been adjusted before delivery. Please do not adjust it without permis-
sion.
2.Hold the brake lever tightly. If the braking performance is still not good, check the
cleanness of the disc.
If the problem cannot be solved, please contact your local authorized dealer for inspection.
Check the Battery
1. Check the Power
The bike is powered by a sealed lithium-ion battery. The battery should be fully charged
before the inspection. Use a multimeter to test the positive and negative voltage of the
discharge port, the normal full voltage should be between 67-67.2V.
2. Check Battery Appearance
Check if the battery’s upper and lower sealing caps and the lcd screen are damaged. It will
cause water get into the power pack if the sealing is damaged. fai Contact the local
authorized dealer if the battery case or cap is damaged.
CAUTION
1. Before installing or removing the battery, please close the key switch and turn off the air
circuit switch, and close the sealant cap of charging port.
2. If the battery cannot be put into the battery compartment, please take out the battery and
check if the battery is stuck by other objects such as cable harness.
3. It is recommended that in winter the indoor temperature for battery storage should be
above 0℃ (32°F) and the battery remaining capacity should be checked regularly.
Charging and Charger Usage
1.When charging, you are required to use the OEM charger. Do not use third-party charger, it
might damage the battery and cause serious injury.
2. Check if the input voltage of the charger is same with the voltage of the power supply.
3.When the battery is fully charged, the charger will automatically stop charging. Avoid
25
26
Troubleshooting
Item
1.The battery cable is loose
2.Throttle is loose or fall off
1.bike dash out protection
2.Temperature protection
3.power-off protection
4.The throttle is malfunctioned
Fault Cause
Troubleshooting Methods
Power On
Motor not
working
Speed fail-
ure or low
maximum
speed
In principle, the first inspection (also known as the first maintenance) can be done at
10-30km if ride normally.
Check Parts
1. The tightness of the spokes on the rear wheel
2. If there is a gap in the headset
3. Check the tightness of chain
4.Belt tightness inspection. (There may be some friction on the new belt, which can be waxed
on both sides of the belt.)
5. Suspension adjustment. Check if there is oil leakage, and if the compression and rebound
damping is in the correct position.(Note: During adjustment, do not turn the adjusting knob
to the extreme position.)
6.Check the tightness of all screws on the handlebars.
WARNING：During the whole maintenance process, the bike
cannot be powered on, which means you cannot do mainte-
nance with the bike is powered on.
Extra attention should be paid to your safety during the inspection.
1. Choose a wide, flat area to park your bike.
Maintenance Guidance
connecting the charger to the power supply for a long time.
4. Users are prohibited to disassemble the battery, disassemble battery without permission
may cause serious injury.
5. When the battery is under over-discharge protection, it needs to be re-activated. Please
refer to P25 < Troubleshooting > for activation method.
Motor and Controller Usage and Maintenance
1. Check tightness of the motor screws regularly.
2. Check the motor and controller insulation condition regularly.
3. Check the fuse condition regularly.
4. Do not wade in deep water, it might affect the motor operation.
CAUTION
When the temperature of the motor and the controller is too high or the battery capacity is too
low, the bike will automatically reduce the power to protect the powertrain.
Replace Fuse
If the speedometer, horn, and headlight do not work after the air circuit switch and key switch
are turned ON, the fuse may be melted. If the fuse needs to be replaced, please turn off the
air circuit switch first. The operation method is as follows:
1. Open the battery compartment cap, turn off the air circuit switch, take out the battery, the
fuse box can be seen in front of the air circuit switch, and open the fuse box. (the fuse box is
wrapped with black insulation tape)
2.Replace the broken fuse with the auxiliary one.Close the fuse box,install the battery,and
close the cover of the battery compartment.
1. Check whether the cable is securely
connected
2. The plug connection is stable
3. Reconnect and secure the terminal
4. Check the brake lever and brake switch
1. Restart the bike
2. Wait for the bike temperature to return
to normal
3. Check whether the cables and plugs of
the brake, tilt switch, and side stand
switch are securely connected
4. Check whether the cable of the throttle
is properly connected to the plug
1. Low tires pressure
2.The charger is malfunctioned
Insufficient
range for
one charge
After con-
necting the
power sup-
ply, the
charger
did not
work nor-
mally, and
the battery
capacity
no display
1. The battery over discharge
protection occurs because the
battery has not been charged
for a long time or improperly
stored
1. Restart the bike
2. Wait for the bike temperature to return
to normal
3. Check whether the cables and plugs of
the brake, tilt switch, and side stand
switch are securely connected
4. Check whether the cable of the throttle
is properly connected to the plug
3.The motor cable is loose or
disconnected
3.Improper brake pads adjust-
ment
4. The battery is overuse or
damaged
5. More uphill, frequent accel-
eration and deceleration,
heavy load
4.Brake lever cannot return to
idle or malfunctioned
Charger not
working
1. Insert the plug or connector firmly to
open the battery compartment cap
2. Open the battery compartment cap
and connect the plug firmly
3. Activate the battery
1. Connect the plug to the charging port
on battery first and then connect to the
power supply, the indicator light of the
charger blinks alternately red and green
2. unplug and re-connect the connector
of the charger and the power supply
once; The indicator of the charger rapidly
blinks red for 20 seconds at a frequency
of 0.5S
3. After 20 seconds, the red indicator
light keeps on for 10 seconds. Within 10
seconds, unplug and re-connector
between the charger power supply once
4. The enforcement charging function of
the charger starts, and the charger
enters the normal charging process
Note: a. Do not remove or insert the AC
plug for 20 seconds in Step 2. Otherwise,
you need to start all over from Step 1. B.
unplug and re-connect to the power
supply process in Step 3 need to be done
within 10 seconds after the red light is
on. If not, restart from Step 1
2.The connector of the battery
power cable is loose
3. The battery over discharge
and need to be Reactivate
1.The connector of the charger
is loose or disconnected
Item
Fault Cause
Troubleshooting Methods
Abnormal
sound when
riding
1. Adjust the tightness of the secondary
chain
2. Adjust the tightness of the primary belt
3. dust in brake disc and brake pads,
need to be cleaned; The brake calipers
are loose or improperly installed
2.Belt tightness is inappropri-
ate
3. The braking system is not
properly installed
1.The tightness of the chain is
inappropriate
Other Fault
In case of the above situation, please
contact the local authorized dealer, do
not dissemble the above parts without
authorization, otherwise it might void
your warranty.
2.The motor, controller, char-
ger, and battery are damaged
1. When you encounter a fault
that cannot be solved or iden-
tified by yourself according to
the instructions above
