MJM E-SO20 User manual

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USER’S MANUAL

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Thanks for purchasing an MJM WHEELS™
SO-20 – step over , or the ST -20 – step through electric bike.
MJM WHEELS™ is based in CANADA, producing high-quality and unique style electric bike with
high-profile components.
Open the box and take out your SO-20 or ST-20 carefully. The package has following items:
SO-20
or
ST-20
CHARGER
PEDALS
FRONT
WHEEL
AXLE
F/R
REFLECTOR
Remove all zip ties and packing material, being careful when it comes to the edge of the frame,
tire and rim.
Follow steps to assembly your ST-20 or SO-20 ebike

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Install Front Wheel
Make sure the brake disc is placed in the center of caliper gap and front
wheel can rotate freely without any noise.
When the brake disc is not in the gap, DO NOT pull brake lever.

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Install Pedals
Use the pedal marked with an “L” on the left side and the right pedal marked with an “R” on
the right side (side with drivetrain gears). The right-side pedal has a right-hand thread
(removes counterclockwise, installs clockwise); the left side pedal has a left-hand thread
(removes clockwise, installs counterclockwise). Be careful to not cross thread the pedals.

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Insert, Remove or Adjust Saddle Height

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Quick Start:
1, Charging:
You can charge your battery installed on or off the bike. If you want to uninstall the
battery, push the key and twist anticlockwise until hear “Click”. Before taking out the
battery, you may need to take out the seat post first.
Charging: Charging Finished:
Install the battery:

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Battery /Display USB port
USB port can be used to charge your Cellphone or laptop
USB port

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LCD Display:
Display Interface
Press SET to switch on the display. The order is: Odometer →Riding Distance →
Riding Time →Max Speed.

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BUTTON DEFINITION
The C300S controller has three buttons, including MODE、UP and DOWN.
“MODE” names to “M”, “UP” names to “ ＋” and “DOWN” names to “－”.
NORMAL OPERATION
1、MODE
Hold the MODE button to start the display. The display will provide power for the
controller. Hold MODE again for the backlight. With display on, press MODE for 1.5
seconds to turn off the power. With the display off, there is no battery consumption.
The leakage current is no more than 2 µA.
The panel will go to sleep when speed is less than 2 km/h for 5 minutes.
2
、
CURRENT DISPLAY
That represents the discharging current of the controller currently, each segment is 2A,
six segments is 12A.

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3, SPEED DISPLAY
It displays the current riding speed of e-bike. The speed display is as below.
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、
KM/H & MPH
Select KM/H or MPH for the speed and mileage, display will be the currently selected units
display.
5
、
BACKLIGHT INDICATOR
With the power on, hold UP for 1.5 seconds and turn on the backlight. Click it again
and turn off the backlight.
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、
6 KM/H WORK
Hold DOWN for 1.5 seconds and enter into the mode of power assist walk. The e-bike is
traveling at 6Km/h. Display as shown below.
7、ASSIST LEVEL SELECTION
Click UP or DOWN to change the stages and output power ratio, the output power range from
level 1 to level 6 for the default (the levels can be customized by user) , the default value is
level 1.

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Some Battery Tips
l Lithium battery capacity is reduced every time they have been used.
l MJM WHEELS™ genuine battery provides 600~800 charging cycles.
l Stay away from extreme environment. The suggested temperature operating limits for the battery is -10C to
45C. Do not store need excessive heat.
l Do not allow the battery to be submerged in water or to be shorted out.
l The battery indicator bar on LCD display is only an approximate indicator of the remaining charge.
l Frequent accelerating and braking will drain the battery charge more quickly than using it to maintain a
consistent speed ride.
l A battery will drain about 5% for every 8 hours of being left in stand-by mode.
l If you are not going to use the battery for an extended period of time, take out the battery and store it in a
cool, dry place.
l Do not use battery when it has less than 10% capacity left.
l Our bike is resistant to splashing, but not water-proof. Please do ride the bike through water deeper than
17.5 cm. The controller box will short out.
l If you have been charging your battery for more than 12 hours and it is not yet fully charged, take it off the
charger and contact MJM WHEELS™.
l The charger may get warm to the touch, so make sure you charge they are in an open area and do not lay
anything on the charger unit while charging.
·Be friendly to the environment! Be sure to recycle your old batteries at a local battery
recycling center. Do not throw them in the garbage.
Battery Storage
How to store your battery for a extended time?
Charge the battery every 3 months to avoid capacity loss. Batteries slowly
self-discharge when left unused for a long time. If a battery is allowed to reach a
critically low voltage, their lifespan and capacity will be permanently reduced.
Always disconnect your charger from the wall outlet and battery before storing the
battery.
Avoid storing your battery in extreme temperatures, whether hot or cold.
Batteries are best kept in a cool, dry place. Do not allow batteries to accumulate
condensation, as this could cause shorting and corrosion.

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Charger
The electric bike comes with its own “Smart Charger” that connects with an
easy-access charger port for recharging the batteries. This charger has lights which
show the battery charge status.
1. Red light means charging
2. Green light means charge-full
3. Input: AC100-240V～, 1.6A (Max) 50/60Hz
4. Output: 42.00V—2.0A
5. Plug the charger into the outlet and turn the charger “ON” via the switch on the
black side. The red power light on the front of the charger will illuminate when the
charger is working properly.
6. Insert the XLR plug into the charger port on the bike being sure the charger plug is
fully seated in the charger port. The second light will start to flash orange for several
seconds while the charger is “seeking” the battery.
7. Once the charger has “found” the battery the blinking orange light will stop
flashing and turn solid orange and cooling fan will start. At this point the charger
process has begun.
8. Once the battery reaches full charger, the orange light will turn solid green.
9. When charging is complete, unplug the charger from the wall before removing it
from the charger port.
.
Use only MJM WHEELS Authorized chargers and batteries.
Using any other charger will damage the batteries and void your warranty.
CAUTION
RISK OF ELECTRIC SHOCK, DRY LOCATION USE ONLY. SEE INSTRUCTION
MANUAL FOR USE.

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Braking Adjustment
Depress the brake lever about 10 times as far as the handlebar grip to check that
everything is operating correctly and that the shoe clearance is corrected before riding
the bike.

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As a final check, please go through this checklist to make sure your bike is
properly assembled and safe to ride:
■Handlebars
 Ensure handlebars are straight and secure and all relevant bolts are tight.
 Test that they are securely attached to the forks by gripping the front wheel
between your legs and attempting to turn the handlebars.
■Wheels
 Ensure the front and rear mudguard stays are tight.
 Check that the quick release mechanism is tightly gripping the front wheel.
■Seat and post
 Ensure that the seat is straight and secure.
■Pedals and chain
 Ensure the pedals are fully wound in, and tight. .
■Chain
 Ensure that the chain is properly set up the gears
■Brakes
 Test front and rear brakes whilst rolling the bike forwards – both wheels should
stop completely.
 Test that there more than a fingers width between the grip and the brake lever
when fully depressed.
■Rack
 Ensure that the rack is secure and that all visible bolts are tight.
■Kickstand
 Rock the bike gently from side-to-side to ensure that the kickstand does not
wobble. Tighten the bolt on the frame directly above the kickstand if necessary.
■Tires
Pump the tires to the point that they are firm and cannot be deformed with
your thumb. This is equivalent to roughly 60ppi of pressure for the Sport and
Classic models and 50ppi for the Urban.
■Electrics
 Test the pedal assist function by rotating the pedals with the rear wheel raised.
 Fully charge the battery before use.

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Before riding:
Adjust the height of the handlebars and saddle to suit the rider, whose toes should be
able to just touch the ground.
■Check that all lights and displays are working.
■Check regularly to ensure that the electrical connectors between the bike
and battery are clean.
■Check the brakes: this can be done by putting the front brake on and
pushing forwards. Do the same with the back brakes. The bike should not
move and the brake levers should not touch the handlebars. The brakes
should work without having to press down too hard on the handles.
■If your bike has a quick release on the front wheel then check that this is
properly tight in its position within the front forks. Quick release
mechanisms can more easily work loose than conventional axles and so
should be checked often for tightness.
■Wear an approved safety helmet when riding your e-bike:
■After mounting the bicycle, turn on the main switch, the power display
light will come on, indicating power is connected
■Release the kickstand, mount the bike, placing one foot ready to pedal,
check that it is safe to proceed, and then set off. You will feel the
motor as you begin to pedal.
■As you cycle, the battery power will be consumed, and the power level
indicator lights will indicate this reduced battery life. .
■Use both brakes together when stopping; do not use only one brake.
■Remember when riding in wet or snow conditions your brakes will be less effective
and a greater stopping distance is needed.
■Do not ride through deep puddles or streams. Ensure that water never
reaches the motor and controller level. This could short out the power and void the
warranty
■Do not carry passengers
■Do not ride under the influence of drugs or alcohol, or when feeling unwell.
■Do not ride at night without lights. If the lights are not working, it may be
safer to walk with the bike.
■Please follow the Highway Code for the safety of yourself and others.

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MJM WHEELS™ LIMITED WARRANTY
To make a warranty claim you wi ll nee d a copy of the ori gi nal recei pt showing the ebike model , date of pu rc ha se,
ebike serial number as retailer information
The warranty is limited to the terms listed below:
Motor and controller: 12 months declining at 1/12. 3 months for labor
Frame: 3 years, 1 year for labor
Charger: 1 year for parts
Battery: Warranty on the battery starts the date of purchase of the
ebike as new. The battery is sealed and cannot be opened or fixed. The battery
should not have a percentage of nominal charge retention of
60% or less. Misuse of the battery, negligence or attempt to open
or repair it will void the warranty.
Consumables: Components subject to wear are not covered by the warranty: Tires, inner tubes, brake lines, brake
pads, basket, wheel lining tape, light bulbs, LEDS, fuses, etc.
If the warranty is void for any reason the customer shall bear any repair or replacement costs resulting from
ebike misuse, negligence or abuse.
Always follow care and preventive maintenance procedures
Always keep receipts from any services performed to the ebike by an authorized distributor or service center.
The warranty will be voided by any of the following circumstances:
（1） Failure to follow all directions or recommendations listed in this warranty and user’s manual.
（2） Cycling collision, accident or ebike damage caused by careless parking or storage.
（3） Acts in violation of laws and regulations.
（4） Service or maintenance work not performed by an accredited technician. performed service or
maintenance on components
（5） DIY repairs on electronic components.
（6） Abusive use the ebike in off-road terrain, mud, snow, water, sand, gravel and water puddles.
（7） If ebike is used as rental unit
（8） Damages caused by natural disasters such as earthquakes, lightning, fire, flooding and other hazards .
（9） Rust and/or paint fading caused to heavy exposure to rain, hail, snow or sunlight.
（10）Overloading beyond recommended capacity .
（11）Damages caused by nails, needles, broken glass , debris , sharp rocks or other foreign
objects .
（12）If ebike is used for stunting such as jumping from ramps, stairs or elevated surfaces.
（13）If ebike is used in competitions or racing
(14) If ebike has been modified for any purposes on the motor, electrical system, suspension frame, wheels.
(15) Use of other components not approved by the manufacturer
(16) Damages resulted from improper transportation
MJM WHEELS™ LIMITED WARRANTY (Continued)
Due to the nature of the product some components must be purchased exclusively from the manufacturer. These
would include, but are not limited to limited to the battery, motor, main gauge cluster, controllers, Led headlights,

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brake drums or disc rotors and pads etc. Other components such as tires, tubes, saddle, racks, and baskets may
be used from market-ready or compatible products previous approval from the retailer or manufacturer.
Get more information of about promotions or new product launches at:
www.mjmwheels.com