After testing the scooter, I realise that this beefy motor bracket acts has a heat shrink! I was amazed to see that the heat was transfert to the side of the scooter, I remember the first time I touch the side, it was pretty warm. This pretty good new. I am also planning to have a fan attach to the motor to give better cooling. I am making some fan design to test it out.

This sort of slack was due to me machining of the motor shaft. The “D” slot ( D-bore) was the problem.

The solution was to make a shim to go between the shaft and the belt pulley to prevent the mouvement.

The coke can makes perfect shim. It measure 0.0035″ ( 0.09mm)

Very easy to cut and make the shape you want.

Making a triangle helps to insert the shim under the belt pulley.

With this solution, I was able to remove the slack in the belt pulley and the shaft. After a couple of hours on the scooter, I saw the shim disintegrated or simply not there when I remove the pulley from the shaft. It does work for a certain amount of time. The shim took the same colours has the shaft and was extremelly hard to see.

The first time I did not see it and the second time I removed the pulley from the shaft,  it was there but hard to see.

Right now,  I did my first test on my Scooter! That might sound weird since there is no post about my other modifications I made. I will post them after this one.

I went today see the guys at www.vamudes.com to borrow a 60A brushless speed controller and some batteries. Vamdues is a technical group here at the University of Sherbrooke that build Unmanned Aerial Vehicle (UAV). I also went to see them because they might need a hand to build there new plane.

I have videos of my first scooter and specifications. The batteries they had was a  Thunder Power RC Pro Lite MS 8000mAh 14.8V.

Specifications for Thunder Power RC TP-8000-4S4PL ProLite MS Military Spec LiPo:

• Voltage: 14.8V
• Cells: 4S4P
• Capacity: 8000mAh
• Max Continuous Discharge: 16C
• Max Burst Discharge: 25C
• Max Continuous Current: 128A
• Max Burst Current: 200A
• Weight: 633g
• Dimensions: 29 x 50 x 255mm

This is a very expensive battery. It cost $329.95 USD. I will not use that in my scooter, not for 330$ and it is only 14,8V!

When it was charge the battery was at 16V and my motor can take up to 36V! We only had one single 16V battery on the scooter.  The motor is so powerfull that it can make wheelies very easy! You really need to be gentle on the throttle. I would guest the speed around 20km/h. It was rainning outside so I did not test it with my GPS to see the official speed.

I will edit the video and post it online.

I was always interested to build a electric moving thing. In may 2009, I when in France to see familly and one of my dad and my mom best friend. His son had this electric scooter that he was not using anymore and he did not have the battery. I told him that I wanted to modify one to make it go real fast. He then gave it to me for FREE!

A big thanks to Paulo!

I will explain how I modify this scooter and all my experimentation about it.

Can’t wait to ride it!

Jerome

The brushless motor weight only 406grams compare to the 1Kg of the original motor.

It is hard to believe that a motor half the weight is 14 time more powerfull. Time will tell…