Tag Archives: electric-bike-kit - Page 3

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.

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.

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.

Electric bike kits for e-bikes

Posted by on December 7, 2022 Comments Off on Electric bike kits for e-bikes

Convert original bike to e-bike should purchase one set of electric bike kit.In market,there are two kinds of electric bike kits.One is electric motor wheel with accessories,the other is bldc motor with chain drive.The second one is hard to convert,so most of people like the first type of e bike kit.

About first hub motor wheel kit,European like 250w electric bike kits,but 750w and 1000w e bike kits more popular in North America.

Leafmotor has below electric bike kits:
1.16″ 18″ 20″ 24″ 26″ 700c 28″ 24V 250W electric bike motor kit
2.16″ 18″ 20″ 24″ 26″ 700c 28″ 36V 250W electric bike motor kit;
3.14″ 16″ 18″ 20″ 24″ 26″ 700c 28″ 36V 500W electric bike motor kit;
4.14″ 16″ 18″ 20″ 24″ 26″ 700c 28″ 36V 750W electric bike motor kit;
5.14″ 16″ 18″ 20″ 24″ 26″ 700c 28″ 48V 1000W electric bike motor kit;

Now we talk about three type classic e bike kits:

1.20″ 36V 750W rear electric bike kit
Model: 601 Kit-1 bike conversion kit
①.20″ 36V 750W rear electric bike motor
②.36V brushless motor controller working with LCD ( New )
③.LCD (Display speed,voltage,mileage…)
④.Twist or thumb throttle with battery guage — optional
⑤.Brake lever
⑥.Three-button ON/OFF Switches
⑦.PAS (Pedal Assist) — optional
Net Weight: 7.86kg — Gross weight: 9.48kg (after packing)
Install: It’s fit for standard 135mm rear frame fork.
Used for: Convert your original bike to electric bike.

2.20″ 48V 1000W rear electric bike kit
Model: 601 Kit-1 bike conversion kit
①.20″ 48V 1000W rear electric bike motor
②.48V brushless motor controller working with LCD ( New )
③.LCD (Display speed,voltage,mileage…)
④.Twist or thumb throttle with battery gauge — optional
⑤.Brake lever
⑥.Three-button ON/OFF Switches
⑦.PAS (Pedal Assist) — optional
Net Weight: 7.98kg — Gross weight: 9.68kg (after packing)
Install: It’s fit for standard 135mm rear frame fork.
Used for: Convert your original bike to electric bike.

3.28″ 36V 250W rear electric bike kit
Model: 701 Kit-1 bike conversion kit
①.28″ 36V 250W rear electric bike motor
②.36V brushless motor controller working with LCD ( New )
③.LCD (Display speed,voltage,mileage…)
④.Twist or thumb throttle with battery gauge — optional
⑤.Brake lever
⑥.There-button ON/OFF Switches
⑦.PAS (Pedal Assist) — optional
Net Weight: 5.72kg — Gross weight: 7.35kg (after packing)
Install: It’s fit for standard 135mm rear frame fork.
Used for: Convert your original bike to electric bike.

want to order electric bike kit

Posted by on November 21, 2022 Comments Off on want to order electric bike kit

Q:
Want to order 1 set of electric bike kit
Detail:
1. brushless hub motor with 36V 500W,no matter if front or rear configuration
2 .suited 16″ wheel (rim+tire)
3. matching controller – capable of reverse direction
some questions:
1. does the motor/controller can effectively brake the wheel or need outer brakes?
2. are the system is ready for adding disk-brake in the future (or even v-brake), if so, do you supply brakes (disk+clipper)

Answer 1:
1.16″ hub motor doesn’t include tyre;
2.Motor control support backward;
3.Brake lever can cut off power and you need outer V-brake or disk brake.
Rear motor can be installed disk brake now,but front motor only use V-brake.

Answer 2:
We suggest you order:16″ 36V 500W rear brushless hub motor kit
The product list about this kit:
1.1 pcs of 16″ 36V 500W or 36V 750W rear hub motor(casted hub+16″× 2 1/4″ tyre)
2.1 pcs of 36V 500W or 36V 750W brushless controller with LCD display speed,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 that used to control front & rear lights,horn…
6.1 pcs of adapter disk tool that can be mounted on motor and used to install disk
7.1 pcs of φ140mm disk+adapter
The answers for other questions:
1.This LCD controller support reverse;
2.Pull brake lever,it will cut off power,but you still need to install V-brake or disk brake.We suggest disk brake;
3.Our rear hub motor can install disk brake now,but front motor only use V-brake;
4.About motor speed,we can customize as your need;
5.This rear motor is fit for 135mm frame fork.
If have more questions,please free to ask.Thanks.

Answer 3:
This hub motor is more powerful,very nice and casted hub is much better than spoke wheel.Don’t worry spokes will be loose.

Answer 4:
New 36V 500W electric bike motor controller works with LCD.
It’s cool.

The best answer:the second answer

help me purchase 250w electric bike kit

Posted by on January 29, 2022 Comments Off on help me purchase 250w electric bike kit

Q:
I want to purchase 1 set of 250w electric bike kit,but found there are two type 250w hub motors showed on leafmotor’s internet shop.
One motor is 250w gearless hub motor,the other is 250w geared hub motor.
Help…What’s the difference between them?Which e-bike kit should I order?

Answer 1:
Order 250w geared hub motor,it’s more popular these days.

Answer 2:
250w gearless and geared hub motors are the same brushless motors.They are both made up of rotor winding,halls sensor, magnet, hub…
The difference between them is with gears / without gears.
250W geared hub motor is a little more powerful than gearless hub motor,but there is some noise from gears.

Answer 3:
We offer 36V/250W — 16″ 18″ 20″ 24″ 26″ 700c 28″ e bike kits.
For example:28″ 36V 250W Rear wheel electric bike kit

Generally 28″ electric bike conversion kit is used to convert 28″ e-bike.
It includes below products:
1.1 set of 28″ 36V 250W rear wheel without tyre
2.1 set of 36V 250W controller with LCD display
3.1 set of 36V twist throttle or thumb throttle (optional)
4.1 set of brake levers
5.1 set of three button ON/OFF switch
6.1 set of disk-adapter plate

The motor and controller are the most important products among this bike kit.
1.Motor:36V 250W brushless geared hub motor,28″ wheel default speed:16.2 miles/hour.BTW,we can customize motor speed as your actual need.
2.Controller:36V 250W 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

High power motors

Posted by on January 29, 2022 Comments Off on High power motors

I have tested the new wheels and the performance from them is perfect.

I have tried them in my bike that has the 24″ 48v1000w rear wheel that I bought from leafmotor in July 2010. This bike has 48v Lifepo4 battery and max speed is 36km/h with the July 2010 motor.
When I put the new 26″ 48v1000w wheel in this bike max speed is 50 km/h.
Then I tried the 26″ wheel in another bike also with another 48v Lifepo4 battery and the performance is also good.
I am interested to find the answer. I dis-assembled the new 26″ hub and the old July 2010 24″ hub and swapped the axle and windings from each motor, re-assembled them and tested again. The 26″ wheel now has 39km/h max speed and the old 24″ is 46km/h.

This tells us that the axle windings in each of the new wheels have much higher power capability than the older wheel.

Actually old hub motor and new hub are the same cost.
Everything is no changed,the same hub,the same rotor,the same magnet,except coil wires.
Change the gauge of the coil wires and/or the turns number of the coils can adjust motor speed,power etc.
Old hub motor is standard motor,it’s fit for US transportation law.26″ 36V 750W, the speed is 20 miles/hour.
If need extra speed,power etc..We can customize as your need.

I am also satisfactory with my bicycle.
18″ 48V 1000W hub motor speed:17 miles/hour

High power performance motor doesn’t depend on speed or power,but customers’ need,law allowed.

My 48V 15-MOS-FET brushless controller drive 700c 48V 1000W electric bike motor,has enough power to climb hill.

This is a reliable hub motor,never meet any problem in 1 year.

I ordered the same motor(hbl 36V 750W hub motor) last month and repeat testing it,perfect.

Not surprising.This electric motor is ripe product and used for e-bikes widely in China.Anywhere you can find this kind of hub motor in China.
You did make a good choice and ordered ripe motor.It’s better than internal control motor.That kind the controller is built inside the motor,because of high temp,easy to break controller.If the internal controller is broken,all system is dead,should replace controller and motor together.

After repaired this hub motor by myself as instructions shown on this forum.I am much better to like this motor,like leafmotor’s forum.

Received my 700c 48V 1000W electric bike kit two weeks ago and took 1 day to done installation.Ride it per day,be satisfying with motor powerful

This is brushless gearless high speed motor, compare to brushless geared motor.The second one has more powerful,but with a little gear noise.Now 750w and 1000w brushless geared hub motors can’t find in market.Most of geared motors are 250w.

We always think faster,better.But because of local law for ebike so that we can’t ride high power motor bike.
I received 36V 750W hub motor,then make a label ” 36V 500W” on it.

From you test,you think faster speed motor is more powerful,actually you are wrong.
Estimate motor performance:faster speed,less powerful,slower,more powerful.

About motor speed,power,I think leafmotor can customize it according as customers’ actual need.

electric bike motor

Posted by on January 27, 2022 Comments Off on electric bike motor

Hub motor,bldc motor,brushless motor,gasoline motor..Any kind of motor,used for electric bike,we call bike motor.

In North America and Europe,gasoline motor is still used for electric bike.Picture enclosed.It can’t received by most of people.

Electric gasoline motor bike,call it an electric bike?But it makes pollution.Call it motorcycle?But it more dangerous than motorcycle, they both have high speed.But the tyre of gasoline motor bike is the same to common electric bike.

Be tired for one week work,please be far from pollution – choose electric motor bike.

Our electric bike motor:
1.14″ 16″ 18″ 36V 750W & 48V 1000W front & rear casting hub motor;
2.20″ 24″ 26″ 700c 28″ 36V 750W & 48V 1000W front & rear spoke hub motor;
3.12″ 16″ 18″ 36V 250W & 24V 250W front & rear casting hub motor;
2.20″ 24″ 26″ 700c 28″ 36V 250W & 24V 250W front & rear spoke hub motor;
Speed from 5~30miles.

Welcome to customise.

Convert electric bike motor kit isn’t too difficult.You need below tools:
1.1 pcs of open-end wrench
2.1 pcs of phillips screwdriver
3.1 pcs of voltmeter
4.some zip-ties

How to install electric bike kit?
1.Make your bike upside down;
2.Use open-end wrench to loose both nuts and remove the front or rear wheel;
3.Find out the direction of motor runs;
4.Fix motorized wheel on your bike;
5.Use open-end wrench to tight both nuts;
6.Connect wires;
7.Make your wheel in the air,power on battery and test;
8.If it can’ work.Please use volt-meter to measure.