Category Archives: bike conversion kit - Page 10

power on the electric bike hub motor was gone

Posted by on March 8, 2025 Comments Off on power on the electric bike hub motor was gone

Electric bike hub motor kit was gone, how to solve it?

Received my electric bike kit .Product list:
1.26″ 36V 250W front brushless geared hub motor wheel
2.36V 6-MOSFET brushless motor controller working with LCD(display speed,mileage,battery gauge..)
3.standard black twist throttle with battery gauge
4.brake lever with low voltage to brake
5.three button-ON/OFF switches that are used for control front&rear lights,cruise,horn…

Check rim whether in the middle of fork and the direction of hub motor runs.Then I have installed everything on my bicycle according as instruction manual and the electric bike kit worked fine.

I was running e-bike about 25km and then I stopped the electric bike motor . Charged the electric bike battery because I was staying there for some hours. Started on the way home and after some heavy hills (about 3 km)it was completely dead. The electric bike kit system was running like normal up to this, but suddenly all power on the electric bike motor wheel was gone.

Those three led lights on twist throttle for electric bike battery were still lit. I tried to turn e-bike off and on again, but same result. Today the electric bike kit is still dead.

Do you have any idea? Measured 0,1 Ohm between the electric bike motor(hub motor phase wire: yellow, green, blue).Infinity between hub motor cable and hub motor cover. So it does not look like it is burned. The electric bike motor controller has 41,8 Volt input.

Measure the hub motor hall sensor:
Red, black, yellow, blue, green wires.
1.The voltage between red and black is 4.5V;
2.The voltage between yellow and black is 4.2V or 0V,(When use hand to turn hub motor, the voltage will change from 0~4.5V~0~4.5V)
3.The voltage between blue and black is 0.2V; (When use hand to turn hub motor, the voltage could not change)
4.The voltage between green and black is 0.1V. (When use hand to turn hub motor, the voltage could not change)

From above test data, I doubt there were two hall sensor inside the electric bike motor that were broken.

Electric bike hub motor kit was gone, how to solve it?

Hub motor, electric bike motor, electric bike kit supplier: Leaf Motor Technology Co., Ltd

The issue about 250W hub motor electric bike kit

Posted by on March 8, 2025 Comments Off on The issue about 250W hub motor electric bike kit

Bought 1 set of electric bike kit from one supplier in China two months ago. Sent more than 10 emails, haven’t gotten any reply. I met below issue, hope solve it.

When I was riding my electric bike three weeks ago, the 250w mini front hub motor suddenly started to make a strange and strong noise. If I try to turn the twist throttle on when the e-bike doesn’t have any load, I keep the hub motor wheel in the air. The electric bike motor works fine and electric bike kit does not make any noise.

However, if I try riding my electric bike and turning the throttle on, the electric bike motor starts making a strong and continuous noise. I tried to riding my bike keeping the brakes continuously pressed and any noise appears so it seems to be some electric problem. It is very strange and I am so much worried.

I took off electric bike kit wheel and used screwdriver to disconnect six screw nuts, took apart hub motor cover and found there was a rotor-winding, two bearings, three sets of 42-gear, 1 set of 21-gear on the axis, 1 set of 81-gear on the hub. There wasn’t any impurity inside the hub motor. Re-install and test electric bike motor wheel, still have the same problem. Don’t know what’s the problem.

Contact my supplier many times and can’t get any reply. I looked for answers by google, yahoo and bike forums, still can’t find the correct answer. Yesterday I got a message from my US friend about there was a company, leaf motor can help me. So I sent an email to leaf motor.

Surprisingly just half an hour past, leafmotor replied me and asked me to check the bearings. How to check hub motor bearing? Take off two bearings from axis, and use little finger to hold inside of bearing, the other hand to turn bearing, faster, better. If you can hear some noise from bearing that can confirm the problem comes from electric bike motor ‘s bearing. At last, I found there was a bearing was broken. According as the bearing model, I bought two new ones in market and replaced them.

Test electric bike kit wheel in the air, no noise. Brake hub motor wheel, still no noise. Nice, Have solved it.

I should thank leaf motor that help me and I found fun through repairing electric bike motor. Now I decide to buy leaf ‘s electric bike kit if I have need and will recommend my friends to order leafmotor’s electric bike motor, bike kit…

Though I haven’t ordered any goods from leafmotor by now. But they are very professional, has best service and believe they have high quality products.

Hub motor, electric bike motor, electric bike kit supplier: Leaf Motor Technology Co.,Ltd

The issue about electric bike battery for bike kit

Posted by on March 8, 2025 Comments Off on The issue about electric bike battery for bike kit

We purchased an electric bike kit including motor controller, hub motor wheel, throttle, brake lever and with 36V 12AH Lithium Ion electric bike battery that used for testing 36V solar charger from one supplier, not from leaf motor. After charging this electric bike battery for 10 hours by better solar power, full charged, we rode the bike, but hub motor wheel only run about 8km. Then we use 110-230Ac charger to charge this electric bike battery and full charged it. After test, we found this hub motor wheel is still lasted for around 8km.

We use a amp meter in series to electric bike kit system, powered on and rode it. We got the current is about 5A. The RPM is 257RM. We use 26 inch hub motor wheel.

We calculate the speed is about 32Km/per hour.
See below formula:
（3.14×26”×0.0254）× 257RPM × 60 minutes ÷ 1000 (m-Km)=32km

If this is 12Ah battery, per hour lost 8ah.We can use 1.5 hours.
See below formula:
12Ah ÷ 8ah/per hour= 1.5hours

We think full charge this electric bike battery per time, the hub motor wheel can run about max 48 km. 32km/per hour × 1.5 hours = 48 km

There is definitely a problem with this electric bike battery, I’m not sure whether electric bike kit is because of the solar charging or our testing, or if it has a fault. But I need a replacement electric bike battery asap, because we don’t have any more 36v electric bike battery, and we sold 1 set of electric bike kit with lithium battery last week. I think BMS inside this electric bike battery no problem. The problem comes from the lithium battery cells. Maybe this electric bike battery had stayed in warehouse for a long time and haven’t charged it. It will make the electric bike battery cut down the achieve distances and use life.

So if solve this problem and let my hub motor to work asap, only replace all cells or replace new electric bike battery.

We are angry with our supplier, sent them many emails and no any reply.
Thank you, leaf motor. Help us found the electric bike battery ‘s problem. We are going to order leaf’s products in near future.

Hub motor, electric bike battery, electric bike kit supplier: Leaf Motor Technology Co.,Ltd

electric bike kit doesn’t work

Posted by on March 8, 2025 Comments Off on electric bike kit doesn’t work

electric bike kit doesn’t work…
Q:Help me! my electric bike kit doesn’t work. Then I turn on the key on the battery the 3 lights on the thumb throttle starts to light. then I press the thumb throttle the motor make a small noise 1 second and doesn’t work. The 3 lights doesn’t light anymore until about 30 seconds later.
I haven’t installed the PAS. Do I have to do that before the bike will be able to spin?
A:Don’t worry.
Could you take a photo with your wires how to connect about your electric bike kit?
1.Non’t connect eight wires(5 hall+3 motor) of motor,turn the motor with your hand.If it runs freely means the motor is good.
2.Then try electric bike kit again
1).disconnect the cruise green connector(green and blue wires)
2).check the throttle connector,make three wires are connected well.(red -red,black-black,green-white) or you could use another twist throttle to replace this.
3).make sure the connector of the battery positive is good.
Q:I disconnect the wires to the motor and the wheel run freely. I connect again.

I disconnect cruise control (green and blue)
I check throttle wires, okay
I check battery wires
I turn on the battery with the key and press the throttle but there is no difference. (It doesn’t work)
I remove the thumb throttle and replace it with the twist throttle , but it still doesn’t work.
I connect the cruise control but its still doesn’t work.
A:Is your thin red battery wire(power switch) connected okay,this wire means a lock,if you connect this wire to battery +,it will make the motor run.
If this isn’t connected well,electric bike kit can’t work.
Q:I took a look at the thin red wire (power switch) that is connected to the bigger red wire labeled +. It look good and has no loose ends.

36V 500W / 36V 750W brushless motor controller

Posted by on March 8, 2025 Comments Off on 36V 500W / 36V 750W brushless motor controller

DC motor controller has two types:brushed & brushless controller.
The principle of brushed motor controller is much simple.But brushless motor controller should control brushless motor phase,limit starting current,control speed,PWM control etc.
MOSFET is an important part of controller.More MOSFET,controller is more expensive.
Generally 6-MOSFET brushless controller is used to control 36V 250W bldc hub motor.
36V 750W brushless motor should be controlled by 12-MOSFET controller.
Now we use 15-MOSFET to control 48V 1000W brushless motor.
Never worry break controller.

Model:LCC-001 36V 500W / 36V 750W brushless motor controller
Working with LCD
Special Features:
1.EABS System
2.1 + 1 Assistance
3.Idle Running Protection
4.Dynamic Motor Lock System
5.Motor Shaft Lock Protection
6.Power Tube Protection
7.Cruise Speed Control
8.Self-check Protection
9.Speed Limit
10.Remote Control Anti-theft

This 36V 500W electric bike conversion kit,Product list:
1.1 pcs of 20″36V 500W rear motor wheel (fast speed);
2.1 pcs of 36V 500W controller with LCD (display speed,battery gauge,mileage..);
3.1 pcs of 36V twist throttle with battery gauge;
4.1 pcs of brake lever;
5.1 pcs of three – button ON/OFF switch is used to control horn,front&rear lights,etc.
6.1 pcs of threaded-adapter is used to fix disk brake

hub motor shook when powered on

Posted by on March 8, 2025 Comments Off on hub motor shook when powered on

Q:Help me! my ebike don’t work. Then I turn on the key on the battery the 3 lights on the thumb throttle starts to light. then I press the thumb throttle the motor shake with some noise 1 second and doesn’t work.

Answer 1:Check wires.Most of problems come from wrong connecting.

Answer 2:Exchange motor wire connecting.Please connect as below picture,thanks.

Answer 3:Don’t worry.My 700c 48v1000w electric bike kit also had this problem.Please exchange yellow and green wires.
Controller ———— Motor
Thick Yellow —– Thick Green
Thick Green —– Thick Yellow
Thick Blue —– Thick Blue

Thin Yellow —– Thin Green
Thin Green —– Thin Yellow
Thin Blue —– Thin Blue
Thin Red —– Thin Red
Thin Black —– Thin Black

Answer 4:My 36V 250W 26″ kit also exchanged these two wires.

Answer 5:No exchange thin red and thin black wires,just exchange three thick yellow,blue,green and three thin yellow,blue,green wires. Exchange 12 times,must find one kind of right phase and system can work normal.

Answer 6:Had better to connect wires as instruction,sometime connect wrong wire will break controller.Even if done wire connecting,still need to re-check connecting.At last put on battery.

Answer 7:Don’t worry,your hub motor can shake that means motor and controller are both okay,please exchange wires according as the instruction of drawing that will solve it.

Answer 8:Hello,holmqvist,how is your e-bike? Still shake…

BEST ANSWER:The third answer.

Convert your ordinary bikes to electric bikes

Posted by on March 8, 2025 Comments Off on Convert your ordinary bikes to electric bikes

Riding an electric bike is a green form of transportation,no gasoline and exercising yourself.You can customize your own electric bicycle with e bike kit,and this bike DIY can be done at home with fun.

Bike conversion kit usually includes an electric bike motor,a motor controller,throttle and brake lever,battery and charger is optional.The most popular electric bike kit package consists of 250 and 750 watts electric hub motor,36 volt 10 amp-hour lithium LiFePO4 battery,and 2-amp charger.

Electric vehicle conversion is gaining more popularity in Euro-American countries for its affordable price and wonderful experience.An converted e bike can travel up to 15 to 20 miles per hour.
12″ 14″ 16″ 18″ 20″ 24″ 26″ 700c” 28″ bike kit

Customize your electric bike conversion kit
1. Mini bike hub motors(24V 250W – 36V 250W)are fit for France,Netherlands,Norway…Europe market
Motor:brushless gear dc hub motor – BIG TORQUE
Speed:15miles/hour with PAS should work with brushless motor controller
Bicycle Rim: 6″ 8″ 10″ 12″ 14″ 16″ 18″ inch casting bike hub wheel
—–20″ 24″ 26″ 700c” 28″ inch bike wheel rim
2. HBL- spoke brushless hub motors(36V 750W – 48V 1000W) are fit for USA,Canada…North America market
Motor:brushless gearless dc hub motor – LOW NOISE
Speed:20miles/hour
Bike Rim:12″ 14″ 16″ 18″ 20 inch casted hub bike kit
—–20″ 24″ 26″ 27.5″ 700c 27″ 28″ 29 inch bicycle rim

More info about 12″ 14″ 16″ 18″ 20 inch casted hub and 20″ 24″ 26″ 27.5″ 700c 27″ 28″ & 29″ inch aluminium bicycle wheel rim,see below picture:

More info about 14″ 16″ 18″ 20 inch casted hub motor.After ride e-bike for a couple weeks,you should tight spokes,it’s an unhappy thing.
Now casted electric motor wheels never get trouble with spokes.

Convert your ordinary bicycles to professional ebicycles YOURSELF!

Posted by on March 8, 2025 Comments Off on Convert your ordinary bicycles to professional ebicycles YOURSELF!

No Traffic Jam, No Pollution, No Gasline! Fun & Healthier Lifestyle!
20″ folding electric bicycle= top quality bicycle engine kit + common folding bicycle
1.Speed: 15mph with pedaling
2.Travel Range: 30 miles per charge
3.Electric bike battery: 36V16AH, 12.2Lb Lithium battery — safe and lightest EV battery
4.Electric bike motor: 36V750W — quiet and powerful
5.Brushless controller — Cruise Speed Control — Make your ride more relax and fun
6.Regenerative braking — Energy saving,safe and smooth stopping experience
7.Anti-theft alarm — Protect your loved ebike from being stolen
8.Aluminium reinforced frame — light and strong
9.Weight: 50Lb only with electric bicycle battery

BLDC motor,Solid casting hub motor made in China
250W 500W 750W 1000W bike motor kit 12″ 14″ 16″ 18″ 20″ 24″ 26″ 700c” 28″
Three kinds of hub motors are used to install on electric bicycles, electric tricycles, electric scooters.
Front motors are fit for standard 100 mm front forks and rear motors are fit for standard 135 mm rear forks.
Size: 12″ 14″ 16″ 18″ 20″ 24″ 26″ 700c” 28″inch casted wheel
Voltage:24V/36V/48V DC
Output Power:250W/500W750W/1000W

Safe,long-life.. EV battery for electric bicycle
Lithium-ion battery is a kind of rechargeable battery.It’s much lighter,no memory effect…Leaf Motor offers 24V 10Ah,36V 10Ah,48V 20Ah,48V 30Ah LiFePo4 batteries and 24V 10Ah,24V 16Ah,36V 12Ah,36V 16Ah,48V 20Ah LiMn2O4 batteries,electric scooter battery,motorcycle battery pack.Please follow us to look for more Li-ion batteries.

need user manual for 700c 250w electric bike kit

Posted by on March 8, 2025 Comments Off on need user manual for 700c 250w electric bike kit

Q:Ordered 1 set of bike conversion kit from leafmotor couple days ago.
Waited for nearly 7 days,picked up box in local post office.
Disconnect this package,everything is nice,especially LCD display,as said,it can display speed,mileage,battery gauge..
Happy to done conversion,spend half a day.Hub motor works well.But can’t find any data display on this LCD, I don’t know how to set this LCD.

Need a user’s manual for set LCD, urgently!!!

Answer 1:
It’s very hard to find this manual on leafmotor’s website.
Please links below address to download this file.

Answer 2:
Thank you,Joe Please free to ask us,if need Tech problem.

This Bike Conversion Kit Item:
Product list as below:
1.700c double aluminium rim front wheel with 36V 250W brushless geared hub motor;
2.36V 250W brushless controller with LCD display(display speed,mileage,battery gauge)
3.thumb throttle OR twist throttle(optional)
4.brake lever with low voltage brake
5.three-button switches(It’s a ON/OFF switch used for control your front&rear lights,cruise,horn..)
6.Pedal Assist(PAS is used for European countries)

Note:About 5 years ago,most of this 250w mini motor is brushless gearless,but it has low torque of disadvantage.Now in market,use this kind of brushless geared motor to replace it.

This motor is still brushless sensor motor,but inside motor,a gear box more. Please review pictures.

The speed of this 700c electric bike kit is a little fast than 26″ bike kit.Because 700c is a little bigger than 26″ rim.

Our standard 250w electric bike conversion kit
Speed:15miles/hour
Power:250W
It’s fit for European cycling law.
Sure,if need high speed or low speed e bike kit,we can customize as your need.

Answer 3:
More information about this 36V 250W brushless geared motor
The structure of inside,picture enclosed.

The best answer:the second answer

battery level

Posted by on March 8, 2025 Comments Off on battery level

Q:small detail. lights of the twist is on but i run motor until battery come dead then the lights all together come off there is no color change when battery get lower

Answer 1:
yeah,seems it can’t display correct.
My 26″ rear wheel 48V 1000W electric bike kit,48V twist throttle with gauge
Power on 48V li battery,three leds(green,yellow,red) be on.
I ride for a long distance last time.Three leds still be on together.I thought it still could run more.After ten minutes later,green led was off.Only yellow and red leds be on and climb a steep hill,the bldc motor stopped.Turn off,then turn on,still can run.But it would stop at once.

Answer 2:
My 26″ 36V 250W bike kit with LCD display.
Though my throttle also has this battery level,I never notice it.
That LCD is really good,can display the voltage of battery,speed,mileage etc correctly.

Answer 3:
This battery level on throttle was designed as the voltage of lead acid.
1.More than 48V,green,yellow,red three leds all ON.
2.From 47V~48V,green OFF,yellow and red ON.
3.Below 47V,only red ON.

48V Battery Full charged G/OFF discharging R/ON discharged
Lead-acid 54V>48V(G,R,Y ON) 47V~48V(G/OFF) <47V(Only red on) LiMn2O4 54V>48V(G,R,Y ON) 47V~48V(G/OFF) <47V(Only red on) LiFePO4 60V>48V(G,R,Y ON) 47V~48V(G/OFF) <47V(Only red ON) When the voltage drops at 47V. 1.Lead acid still can work normal. 2.LiMn2O4 and LiFeO4 are hard to work,it can't supply large current,BMS will stop cells working.For example:the voltage of li battery is 48V,still climb the steep hill,green led will be off at once,after about 10s,yellow led will be off,only red led ON. Answer 4:
Never see this battery level.I will charge battery after running 30miles when it’s new.
Now I should charger it earlier.

Answer 5:
My bike kit works with 48V lead-acid battery,no problem.I will charge it when the green led is off.

Answer 6:
It’s a pity,this lcd can’t work with 36V 750W brushless controller.

Answer 7:
I found good led light,it can display battery gauge.

Answer 8:
My 250w electric bike kit working with lcd.

Answer 9:
Nice lcd and lights,but can’t find these lights shown on leafmotor’s website.

Answer 10:
I found a li battery on leafmotor’s website.It has gauge on battery shell.

Answer 11:
These green,yellow,red three leds on throttle only display approximately,if need to know exact battery gauge,I think had better to order LCD.