OwnerJake Saunders
Owner's Other EV2007 Mini 49cc Dirtbike
LocationWellington, Wellington New Zealand map
Email email image
Vehicle2009 Chinese Pocket Bike
Converted from Petrol to electric
MotorUnite Motor 1000w Permanent Magnet DC
Nice Big 1000w motor 3 years old and is in perfect working order.
DrivetrainPetrol 49cc WEST
Controller4QD Uni-8 36v 80 Amps
Batteries4 Maplin 12 ah, 12.00 Volt, Lead-Acid, AGM
System Voltage36 Volts
Charger 12v 6-8 amps
Instrumentationbattery meter and main power switch. Speedometer also.
Top Speed25 MPH (40 KPH)
When 48v should see 35 mph
AccelerationVery good top speed in less than 50 meters
Range6 Miles ( 9 Kilometers)
Normally full speed all the time... probably used for racing
EV Miles
Start:52 Miles (83 Kilometers)
Current:35 Miles (56 Kilometers)
Total:-17 Miles (-27 Kilometers)
 
    As of 5/5/2009
Seating Capacity1 adult
TiresChinese ones still from stock bike
Conversion Time2 full days, plus various hours tuning it.
Conversion Cost€200

$$275
About a year ago I had decided to start converting my old broken noisy *crap Chinese thing into an electric mini moto. I have had experience with motors and electronics in other projects before; Chinese electric dirt bike, electric bike, electric scooter etc...

And a year later here I am showing you how I have built this monster from a rubble. It had been sitting in my garage with the rolling chassis and the motor attached, nothing else had been done. I had no money to buy a controller and had not had a chance to add or modify it.

I hope this thread will help people and I would like to be given ideas to improve or add anything, please. These are the steps and processes I took to build my bike:

First of all I dug out the mini moto with the 1000w motor attached. the motor is 36v which is the same as the system I am running. I will hope to make it to 48v to get more speed. I was also wondering what size chain it is I am using?

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I then got all the materials together to begin to make the circuit.
1. 2 batteries of 12v 12ah
2. 1 battery of 12v 7ah
3. Uni-8 36v 100amp controller from www.4qd.com
4. Magura throttle and matching grip
5. Key switch
6. Battery level indicator of 7 LED's

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I then decided to make a battery pack out of the three batteries to make it easier to charge and put the bike together. :P I also attached the LED battery indicator.

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This is what the circuit/setup looked like before attaching it to the bike.

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This is the final bike;

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Specifications:

Owner: (me) Jake Saunders
Location: Cadiz, Spain
Email: jake27surf@hotmail.com
Vehicle: Chinese petrol mini moto
Motor: 36v 1000w unite motor
Controller: 4qd uni-8 100amps 36v
Batteries: 1 Chinese 12v 7ah 2 Maplin 12v 12ah
System Voltage: 36v and i want to up it to 48v
Top Speed: 20-25mph --- around 30 - 35kmh
Range: no idea, batteries are nearly two years old and not working well :S
Conversion Time: 2 days on and off working on it
Conversion Cost: 250$ or €200 with most of the products coming from the USA.

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Thanks for looking at my bike and reading all of this. If you have any questions feel free to post them here. I am 15 years old if anyone is wondering and I would please like to have suggestions [:D]
Thanks
Jake

code by jerry