RKS GF Series User manual
www.rksmotor.eu
GF / GS / CR SERIES
USER MANUAL
E-BIKE
01
TABLE OF CONTENT
1. The Purpose and Benefit of a Booklet
2. Assembly Instructions
3. Operation of Your Electric Bike
4. Best Practices
5. Adjustment and Maintenance
6. Troubleshooting
FOREWORD
The following operation manual is a guide to assist you. This manual is
not a complete document on all aspects for the maintenance and repair of
your bike. The electric bicycle you have purchased is not a complex
object however, it is recommended that you consult an pedelec repair
specialist if you have concerns as to your ability to assemble, repair, or
maintain this product.
It is important for you to understand the electric bike. By reading this
manual completely before the first ride, one will get better performance
and enjoyment from this product; also it's helpful to extend the life of the
electric bicycle.
This operational manual should remain an integral part of the product.
Changes or any copy actions in pictures, specifications and descriptions
are strictly prohibited.
02
ABOUT THIS MANUAL
WHY YOU SHOULD READ THIS MANUAL
Ths manual s wrtten to help you to get the best performance, comfort,
enjoyment and safety when rdng your new E-Bke. The manual
descrbes specfic care and mantenance procedures that help protect
your warranty and ensure years of trouble free use. Please pay partcular
attenton to the secton on battery chargng and mantenance.
It s mportant for you to understand the features and operaton of your
new E-Bke so that you can get maxmum enjoyment wth maxmum
safety. By readng ths manual before you go on your first rde, you’ll know
how to get the most from your new E-Bke.
It s also mportant that your first rde on a new E-Bke be taken under a
controlled envronment, away from cars, obstacles and other cyclsts.
WARNING
Cyclng can be a hazardous actvty even under the best crcumstances,
Gvng Proper mantenance to your E-Bke s your responsblty as t
helps to reduce the rsk of njury. Ths manual contans many “Warnngs”
and “Cautons” concernng the consequences of falure to mantan or
nspect your E-Bke. Many of the Warnngs and Cautons say “you may
lose control and fall” Because any fall can result n serous njury or even
death, we do not repeat the warnng of possble njury or death whenever
the rsk of fallng s mentoned. Please note that those rsks are present.
Your E-Bke can provde many years of servce, fun and fitness-f you take
good care of t.
Understand the features of your E-Bke and become aware of the
challenges that you wll meet on the road. There are many thngs you can
do to protect yourself whle rdng. We wll offer many recommendatons
and safety tps throughout ths manual. The followng are those that we
beleve are the most mportant.
Always Wear a Helmet!
Helmets sgnficantly reduce the possblty and severty of head njures.
Always wear a helmet that comples wth your state laws when rdng the
E-Bke.
03
Check wth your local polce department for requrements n your
communty.
Do not wear loose clothng that can become tangled n the movng parts of
the E-Bke. Wear sturdy shoes and eye protecton. Also check your state
laws concernng other protectve wear that may be requred when rdng
the E-Bke.
Know Your E-Bke!
Your new E-Bke ncorporates many features and functons that have
never been bult nto a bcycle before. Read ths manual thoroughly to
understand how those features enhance your rdng pleasure and safety.
Rde Defensvely!
One of the most common cyclng accdents s that when the drver of a
parked car opens hs door nto a rder’s path.
Another common occurrence s when a car or another cyclst moves
suddenly nto your path. Always be aware of other vehcles around you.
Do not assume that drvers or other cyclsts see you. Get prepared to take
evasve acton or stop suddenly.
Make Yourself Easy To See!
Make yourself more vsble by wearng brght reflectve clothng. Keep
your reflectors clean and properly algned. Sgnal your ntentons so other
drvers and other cyclsts can notce your actons.
Rde wthn Your Lmts!
Take t slow untl you are famlar wth condtons that you encounter. Be
especally careful n wet condtons as tracton can be greatly reduced and
brakes less effectve. Never rde faster than condtons warrant or beyond
your rdng abltes. Remember that alcohol, drugs, fatgue and
nattenton can sgnficantly reduce your ablty to make good judgments
and rde safely.
Keep Your E-Bkes n Safe Condton
Check crtcal safety equpment before each and every rde
04
Know the Law
Cyclsts are requred to follow traffic rules. Addtonally, some
communtes regulate the use of motorzed bcycles regardng mnmum
age requrements and necessary equpment. Check wth your local polce
department for specfic detals.
Correct Frame Sze
When selectng a new E-BIKE, the proper frame sze s a very mportant
safety consderaton. Most full szed bcycles come n a range of frame
szes. These szes usually refer to the dstance between the center of the
bottom bracket and the top of the frame seat tube.
For safe and comfortable rdng there should be a clearance of no less
than 1-2 nches between the gron area of the ntended rder and the top
tube of the bcycle frame, whle the rder straddles the bcycle wth both
feet flat on the ground.
The deal clearance wll vary between types of bcycles and rder
preference. Ths makes straddlng the frame when off the seat easer and
safer n stuatons such as sudden traffic stops. Women can use a men’s
style bcycle to determne the correct sze.
05
The Purpose and Benefit of this Booklet
This booklet describes assembly and safe operation of your electric
bicycle. Pictures are for reference only and may show the similar
component from another model.
•Please Read The Entire Users Manual Before Riding Your New
Electric Bicycle
• Always Check Bike, Brakes, Tires and Screws/Nuts for Tightness
Before Riding
• Recharge your electric bike before your first ride and after any long
distance operation.
Things you must know before your first ride
Please read this manual carefully before operating your e-bike in order to
familiarize yourself with the bike and its different functions.
Please learn and observe all the road rules while riding your e-bike on
public roads, including ALWAYS wearing an approved helmet.
The correct helmet should:
•Be comfortable to the rder
•be of lght weght
•have good ventlaton for the head
•fit snugly
•cover the forehad
It is your responsibility to familiarize yourself with the laws of the state
where you ride and to comply with bicycle laws
Young children, pregnant women and any persons with vision, balance,
or other problems that would prevent them from riding a bicycle should
not use the pedelec.
The e-bikes are not designed for two riders. Please ensure only one
person at a time is riding the e-bike.
E-bikes are for on road or improved trail use only and should not be used
for riding rough trails. Damage to the bike may occur if used off road.
Do not operate your electric bike after consuming any amount of alcohol
or taking any drugs.
06
All photos are for general reference only and may differ slightly for
each model of pedelec.
NEVER carry a passenger on the Electrc Bke!
NEVER modfy the Electrc Bke wth unapproved accessores.
NEVER rde through deep water.
NEVER perform wheeles, jumps or trck stunts.
AVOID rdng n the ran for long perods of tme.
AVOID water contact to motor and electrc lnes.
ALWAYS keep both hands on handlebars.
ALWAYS apply brakes lghtly when rdng on rocks or loose
surfaces
ALWAYS use cauton when gong through puddles.
ALWAYS nspect the Electrc Bke before each rde to nsure a safe
rde.
Attenton:
1. For saving the energy and extending the life of battery, please use
pedal for assistance on the electric bike when climbing the slope or
meeting windy day.
2. Please read the manual carefully, do not use the electric bike before
familiar with its performance. Do not lend it to the one who does not know
about its operation.
3. When in the bad weather like rain or snow, the brake distance should be
increased.
When the electric bikes run at the speed of 20km /h, the wet brake
distance should be not longer than 15m. Please adjust the brake
frequently and change the brake pad in time.
4. Check the tightness of the chain. The tightness should be about 15mm.
When adjust the chain, loose the rear axle nuts, adjust the chain tightness
screw making sure the chain tightness is proper, then tighten the rear axle
screw.
5. For the safety of you and other people, cut the power supply when it is
not used.
6. Check the air tension frequently.If the air is too less, the resistance will
increase, affecting the running range.
7. The electric element can only be cleaned outside, no need to be
maintained for the inside. Do not open it by yourself. (If these parts
opened by yourself, no warranty for it)
0107
8. It is forbidden to be overloaded for the electric bicycle. If it is
overloaded, the electrical parts will be damaged.( the plastic parts may
disformed for the high temperature, or the fuse socket will be damaged
for the high temperature) These are not under warranty.
9. Please cut off the power if there is problem on the electrical parts.
10. Please pay attention to national legal requirements when the bicycle
is to be ridden on public roads (e.g. lighting and reflectors)
11. The A-weighted emission sound pressure level at the driver ears
should be less than 70 dB(A).
Getting Started
First, unpack your electric bike carefully and save all packing material. Be
sure to locate your charger, pedals, keys and any small parts like nuts or
screws inside the shipping carton. Sometimes small parts like nuts or
screws may come loose during shipping so be sure and check the bottom
of the carton and protective wrapping carefully. Keep your packing
material until you are through assembling your bike and know that it is
running properly.
Sometimes small parts like nuts or screws may come loose during
shipping so be sure and check the bottom of the carton and protective
wrapping
Assembly Instructions
This bicycle was fully assembled, inspected and tuned at the factory and
then partially disassembled for shipping.
Your bike arrives in the shipping carton about 90% assembled. To ship the
bike, the pedals, seat, front wheel and sometimes the handlebar are
loosened or removed.
In order to ensure the cycling safety and using performance, the fastening
requirements for the bolts of key places.
08
Name of clamp bolts
Bolt for handlebar
Handlebar expander bolt
Handle bar stem and fork clamp bolt
Sunflower fixng bolt
Saddle
Seat-pllar fixng bolt
Front wheel
Rear wheel
All bolts, nuts and mountng hardware
1 bolt / 2 bolts
4 bolts
M5
M2
M4
M5
M6
M6
M8
M5
M7
M6
M8
M4
M5
M6
M5
M6
M10
10-12
12-15
4-6
6-8
8-10
12-15
15-18
8-10
10-18
10-12
15-18
8-10
10-12
12-15
6-8
8-10
8-10
4-6
25-30
40-45
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
N.M
Standart torque / N.m
This manual will list all of the steps required for the various models.
The following “basic” assembly instructions will assist in getting the
bike ready to ride. If you have questions about your ability to assemble
this product, please consult a qualified bicycle technician.
We recommend that two people work together to assemble the electric
bicycle
Your handlebars have two main parts--the bar itself
and the stem.On some models, the stem can be
adjusted to tip the handlebar forward or back. If your
bar has been removed for shipping, position the bar in
the center of the stem and check, to be sure that your
grips are in the right place and the angle of the bar is
comfortable. Tighten the screws to hold the bar in
place, ensuring all brake cables is clear.
Be sure to check that your handlebars are centered
and tight before riding
The stem must be inserted to the Minimum depth or
lower as indicated on the steer post to insure the
safety, see the picture. Tighten the stem screw
located on the top of the handlebar stem.
You may adjust the handlebar stem height by
loosening the Allen key screw located underneath the
stem. Tighten the stem, adjustment screw securely
after positioning the stem.
Check that the forks and the handlebars are facing
forward and straight. Stand at the front of the
handlebar, vise the front wheel by your legs and hold
the handlebar, adjust the hadlebar and the body of the
bicycle to form an angle of 90degree, see the picture.
Some models have a light/power meter console
that attaches to the handlebar. Attach this with the
plastic brackets and screws provided.
09
The adjustment of the wheel:
After loose the wheel, please adjust it according to the recommend
torque.
Check and adjust the Front Brake
10
Check and adjust the Front Brake
1. Screw down the positioning screw;
2. Adjust the distance of brake shoe by left/right rotation, the left
rotation of brake shoe adjustment bolt will increase the distance of
brake shoe, and the distance of brake shoe will decrease on the
contrary (as shown in Fig and disc Fig).The adjustment for brake shall
be made according to conditions.
Adjust the rear brake
For models with standard bike rear brakes:
Remove the bolts and safety catches from the axle. Slip the wheel into the
forks. Slip on the safety catches and then the nuts on both sides. Spin the
wheel in order to check that it is straight, Adjust as necessary. Tighten
firmly.
The rear brake s operated wth the left brake handle normally
11
Always check that both your front and rear
brakes are properly adjusted before riding
your bike.
Squeeze your brake together and slip the
cable into the trough. You may need to adjust
the cable length by loosening the nut and
sliding the cable through to the proper
position.
Retighten nut to hold the proper position.
Adjust the brake pads on either side by using
an Allen wrench so that they make contact
on the metal wheel rim and not the tire. Be
sure they are straight and the distance is 1-
1.5mm between rim and the two brake pads.
The pads will be close when adjusted
properly.
There are some small adjusting screws on
the sides of the brake pad levers that can be
used to adjust the distance of each side. If
the distance of the two brake pads to the rim
is different, adjust the spring
adjustment screw on the two brake arm of
the fixed mount till the distance of the two
sides is the same, making sure that it can
brake efficiently. If the brake pad is damaged
severely, please replace it in time thus
ensure the efficiency of the brake
Adjust the Saddle
Your seat will tip forward for easy battery
removal on most models.
Your seat height is adjusted by a quick release.
Pull the quick release lever, Insert your seat post
to at least the minimum insertion line marked on
the post. Tighten the adjusting nut by quick
release lever, then push the quick release lever
to the closed position.
The seat angle is adjusted with the nuts that
attach the seat to the seat rail. Ensure that the
nuts are tightened firmly and that the seat does
not move forward or back while you are sitting
on it.
Adjustment of the seat post
The adjustment method is as follows :
Loose the hand release of the seat post, take
out the seat post ; Adjust the screw , Take the
seat post back the the frame tube as former
station,
and tighten the clamp of the seat position.
12
Attach the Pedals
Pedals are marked „L‟ and „R‟ on axle end, Screw
the pedal marked „L‟ into the left side of crank and
„R‟ to right.
(1).The right pedal attaches to the chain side crank
arm with (clockwise) thread
(2). The left pedal attaches to the other arm and has
a left-hand (counter clockwise) thread.
Check your pedals before each ride to ensure that
they are tight. If you ride your bike with loose pedals,
you may strip the threads that hold the pedal to the
crank.
13
Operation of Your Electric Bike
Your e-bike is driven by a motor embedded in the hub of the rear wheel
and can not be driven directly by throttle. The motor is powered by a
battery. The amount of power delivered to the motor, and hence the
accelerating force on the e-bike, is controlled by you in a way according to
the power-assisted mode you choose.
Electric -Assisted:
You must turn on the battery to use the e-bike in Electric-Assisted mode.
In the Electric-Assisted model, power assist is triggered when you pedal
forward, and power assist stop when you stop pedaling. In other words,
power assist happens as long as you pedal. You don't need to pedal hard.
All you need is to apply a light force to the pedals continuously to maintain
the current flow. When you apply one of the brakes, power-assist will
automatically stop.allowing the e-bike to slow down and stop. Power
assist will turn itself off when the e-bike has reached the maximum speed
of 25km/h.
You should use the SHIMANO gear shifter at the handlebar to set the
gears appropriately according to road conditions and pedal as usual, you
will find that you need to exert a lot less effort and the e-bike travels faster
and at a more steady speed.
Note that the Battery level indicators on the handle bar will show the
correct level only when power is not being drawn from the battery.
Charging Your Battery
Fully charge your battery before your first ride and then after any
operation, especially after long distance riding
Your charger plugs directly to your battery pack with either a round (RCA
or XLR) connector or the same 3-prong plug as your bikes power cord.
You must plug your charger to the bike first and then to the wall outlet.
NEVER PLUG A POWER CORD FROM A WALL
OUTLET DIRECTLY INTO THE BATTERY! YOU
MUST USE YOUR CHARGER!
The light on the charger will be red while charging
and turn green when finished. When the charger's
light turns green, please keep on charging the
battery for 1-2 hours to ensure that the battery has
a longer usage life. Then unplug your charger
from the battery and the wall.
14
Always charge your battery before it gets too low. If you let your pack run
completely dead, it may not re-charge. It is a good idea to turn the key to
the position OFF and remove your key after any ride so that it will not be
left on accidentally.
Your lithium battery pack switch has three positions. All the way to the left
is "off". Turn the key to the right to turn the bike on.
To unlock the pack, push the key in slightly and turn to the left. It can then
be removed. Push-in and turn right to lock it on.
The red button on top of the pack shows the power level when pushed.
The first light only comes on when the battery is too low to run the bike.
The next lights indicate low, medium, and full. The lights on the handlebar
also show the level.
Remember: the sooner you charge after riding the longer your pack will
last.
The Lithium battery is built with circuitry that prohibits over-charging and
excessive discharging.
The battery charger is designed specifically for the bike; connecting the
battery to any other charger will void the warranty
Operation of Your Display
There are 3 power-aid levels, which are “LOW” “MED” and
“HIGH” The bike travels around 18km/h at level
“LOW”,22km/h at level ”MED”,and 25km/h at level
“HIGH”.
Press the “ON/OFF” and “MODE” button to switch between
different assist levels.
To the right of the “ON/OFF”button is the battery monitor, all
of the 4 leds are active, which indicates that the battery is
full.Please recharge the battery whenever the number of
active led is less than 2.
Derailleur
The gears or derailleur should only be shifted as you
pedal to keep the derailleur in adjustment. The derailleur /
shifting and pedaling are completely independent of the
motor.
15
Best Practices
Please observe the traffic regulations.
Keep both your hands on the handlebars ready to brake while riding.
Always charge your battery after riding.
Don' t run your battery dead or extremely low. If you do, charge as soon as
you can.
Remember to turn off the key when you stop.
Always remove the key when you are through riding. If left on, the battery
will slowly drain.
Running distance per charge of King Sports E-bike
Under standard road conditions (concrete and cement road without wind
resistance and with temperature around 25°C, the battery capacity
attenuation≤5%), the running distance per charge is up to at least 30 Km.
Warning:
1. The rated loading capacity for the rear rack is 25kg. It does not fit for
Children Seat.
2. The total loading capacity should be not over than xx kg (Rider sample
weight luggage load).
3. The fastener of the whole electric bicycle should be checked frequently.
4. Please put on your helmet when riding the electric bike.
5. If there is no rear rack on the electric bicycle, do not fix the rear rack by
yourself.
6. The rear rack cannot draw a trailer. And the installation of the rear rack
can not shield the reflector or light.
7. When the goods are put on the rear rack, the reflector or the lights
should not be blocked. The goods should be put on the two side of the rear
rack evenly.
16
The match of the electric bicycle and people
Adjustments and Maintenance
• Your e-bike is designed for regular road for a single person. Using
your e-bike for extreme maneuvers, such as extreme off-road use,
jumping, or carrying excessive load will damage the e-bike and could
cause serious injury.
• Do not use high pressure water streams to clean your e-bike, as water
might seep inside the motor or the wiring compartment and cause
rusting of electric parts or short circuits. Please use damp cloth with
neutral detergent to clean the bike body. Do not use alkali-based or
caid based detergent such as rust cleaners as it may result in damage
and/or failure of the bike body.
• Avoid parking your e-bike outside when there is rain or snow. At the
end of a trip where there was rain or snow, bring the e-bike inside and
use a clean, dry towel to eliminate any wetness.
• During daily use,please keep the controller clean and dry.keep it away
from water,vibration and contamination, otherwise the controller may
be damaged.
Warning!
Don not over lubricate. If oil gets on the wheel rims or the brake shoes, it
will reduce brake performance and a long distance to stop the bicycle will
be necessary. Injury to the rider or to others can occur.
• The chain can throw excess oil onto the wheel rim. Wipe excess oil off
the chain. Keep all oil off the surfaces of the pedals where your feet
rest.
17
• Using soap and hot water,wash all oil off the wheel rims,the brake
shoes,the pedals,and the tires.Rinse with clean water and dry
completely before you ride the bicycle.
• Using a light machine oil (20W) and the following guidelines,lubricate
the bicycle:
Some instructions on battery maintenance and charging
1. Please charge the battery for 6-10 hours after its energy is
consumed for 50%-70% of its total energy , in this way, the battery life
will be longer. If you leave the battery pack in your stock in less energy
condition, it will sleep to die easy. So please charge the battery pack
full after each long distance ride. Do not charge the battery for a long
time (that is “exceeds 10 hours”) in summer; in case that the battery
will be calorifacient and broken.
2. Recharging battery once a month during the period of storage
3. Charging temperature:0℃～45℃
4. Battery pack might not been fully charged when temperature is over
low or over high. When the battery is charged, its temperature may
become a little higher, it is normal under the temperature of 50℃.If the
charger indicator is useless when the battery is full charged or the
battery is very hot (that exceeds 50℃), please come to the seller to
find maintenance at once.
5. Do not make the charger jolty in the rear box if there is one box
attached; and the charger should be far away from water. The impact
and shake should be at the lowest degree when the battery is moved.
6. Each special designed charger is provided for each battery pack. Do
not use other type of charger for fear of burning out battery and
causing danger.
7. Battery storage conditions: cleanliness, coolness, dryness and
airiness, temperature 0℃～45℃。No solarization, fire, water-logging
and mixing the battery together with corrosive substance during
battery shipping and storage.
8. Please let the key on the head of the battery case be "on" when you charge it.
Motor
B.B
Chan
Every 1 Year
Pedal Every 6 Months
Every 6 Months
Every 6 Months
Contact a professonal techncan
Put 4 drops of ol where catch pedal axle
goes nto the pedal
Contact a professonal techncan
Put 1 drop of ol on each roller of the chan
Bike has
reduced
speed and/or
range
1) Speed sensor is not
adjusted
2) Low batteries
3) Faulty batteries
4)Low tire pressure
5) Brakes dragging
against rim
1) Adjust speed sensor
2)Charge batteries for
recommended time
3) Replace batteries
4)Inflate tires to
recommended pressure
5) Adjust brakes and/or rim
3
9. Please sure that there is no short-circuit in your wall socket for fear of
burning out battery and causing danger.
10.Please don‟t pull out the power key when you are riding the bike
forward under highspeed.
BATTERY DISPOSAL
W A R N I N G !
NEVER throw batteries away in the trash. Take the exhausted battery to a
federally or state-approved battery recycle center. Call your waste
collection service to find out if they offer disposal of batteries.
Faults and Trouble-shooting
18
Battery
gauge lights
up but bicycle
does not
operate
1)Power cord is not properly
plugged into battery
2)Brake cut-off engaged or
faulty
3) Speed sensor adjusted
too low
4) Blown fuse
5)Loose motor wire
connector
6)Loose connectors
7) Broken wire
8)Throttle disengaged or
faulty
1) Properly plug in
power cord to battery
2) Disengage brake cut-
off or replace
3) Adjust speed sensor
4) Replace fuse
5) Check motor wire
connector
6) Check all connectors
7) Inspect all wires
8) Engage throttle or
replace
1
Bicycle operates
but battery
gauge does not
light up
1)Loose connectors
2) Damaged wires
3) Faulty battery gauge
1) Check throttle
connectors
2) Inspect all wires
3) Replace battery gauge
2
NO FAULTS CAUSES TROUBLESHOOTING
This manual suits for next models
5
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