Electric Go Kart
I will be showing you how I transformed an old gas powered go kart into an electric go kart. This project was very time consuming and I am very happy to finally share it with all of you! The hardest part of this project was definitely searching for all of the parts and overcoming issues along the way. This go kart is loads of fun to drive around town and with the current sprocket set up it can go around 50kph!
Before you go through the rest of the steps for this project, you should definitely watch the video that I have posted below. The video will show you plenty of clips of me building the go kart from start to finish and you will also be able to see my drive it! Also, if you enjoy the video you should definitely hit the like button or even consider subscribing to my YouTube channel.
Step 1: Buying an Old Go Kart
A while back I was browsing through Kijiji and I came across a rusty old go kart which I ended up purchasing for only $60! This go kart did not run and was overall in very rough shape. All that mattered was it had a lot of the parts that I needed in order to complete this project. I had the idea of making an electric go kart for quite some time and when I saw this go kart for sale I knew it would be the perfect time to get the project started.
Step 2: Restoring the Frame
I spent a lot of time restoring the frame along with some of the original parts. I started by disassembling the entire go kart. The frame was very rusty and all of the old paint was peeling off. The first thing I wanted to do was grind the frame down to bare metal in order to prepare it for a new paint job. After removing all of the rust I realized that the frame was very short and because I am 6’ 2" my legs would not fit comfortably. I ended up cutting the frame in half and extending it by 5".
Once that was finished I gave the frame a fresh coat of paint and then slowly began putting the go kart back together. The paint I used was a vibrant orange Rustoleum oil based paint.
Step 3: How It Works
Before I go any further with this Instructable I am going show you all of the parts that I used and show you how everything will work.
The parts that I used were:
- A 1600W 48V brushless motor
- A 1600W 48V speed controller
- A 48V hand throttle with a battery indicator and speed limit switch
- A 3 pole charge port
- A key switch
- And a 48V 12AH lead acid battery pack
I would have much rather used lithium ion, but that would have made things much more expensive.
In the pictures above you will see a diagram that I made so that you can see exactly how I wired everything together.
The motor, speed controller, hand throttle, charge port, battery charger, and batteries were all purchased from: http://www.hyperpowersports.com/categories/electric-scooters/parts-for-hyper-racing-1300/electric-scooter-parts.html
You can also find most of these parts on Aliexpress.
Step 4: Making the Foot Throttle
One of the first things that I did was convert the hand throttle into a foot throttle. I started by disassembling the throttle and removing the battery indicator, as well as the speed limit switch. I will be re using the battery indicator later on but I won’t be re using the speed limit switch.
I then took some measurements and designed a foot pedal on Tinkercad which I then printed using black ABS. The pedal just slides on and is fastened into place with two screws. I then covered up the existing holes so no dust will get inside and added a spring to give it more tension. I also added a stopper so the pedal can’t get pressed too hard and snap.
Here is a link to the .STL file: http://www.thingiverse.com/thing:2248293
Step 5: The Build
Here are some pictures of me assembling the go kart so you can see how I put everything together.
The original rear hubs were seized onto the 1" live axle. I was forced to cut them off with a grinder and look for new ones. Luckily my neighbor had some old wheels in his shed so I took them apart and cleaned them up. Originally these hubs had bearings inside and were not made to go onto a live axle. What I did was removed the bearings and welded on some weld on hubs from Princess Auto.
The seat that originally came on the go kart was broken in half. The new seat is a LEIFARNE seat shell from IKEA and it works perfectly!
I used Molex connectors to connect all of the electrical components together. All of the electrical components get connected to the speed controller. The speed controller is fasted inside of a 6"W x 8"L x 3"H aluminum project box. On one side of the project box there is a flexible grommet which all of the wires can be fed through. The other side of the project box is where I fastened the charge port. On top of the project box is where I put the key switch as well as the battery indicator. I put heat shrink around the battery indicator to avoid any short circuits.
The go karts brake is a simple disc brake which is connected to a foot pedal at the front with a length of threaded rod.
The sprocket on the motor is a 12 tooth sprocket and the sprocket on the axle is a 61 tooth sprocket. The chain size is #35. The sprocket on the motor is custom made. I welded a 12 tooth sprocket from princess auto onto the T8 sprocket that came with it.I ran the motor and held a flap disk to it in order for the outer diameter of the old sprocket to fit inside of the new one. That way it could be welded on perfectly straight.
Step 6: Things to Know
Overall I had a lot of fun building this go kart and it works better than I expected! Although there are some features that can be added. One very important thing that I am missing is a chain guard.
I have yet to determine how far it can go on one charge (I will update this when I know). I only drive the go kart for about 20 minutes at a time. I do this just to allow the motor to cool off.
Also, for better results try to keep the weight of your go kart as light as possible. This will result in better performance.
If you have any questions please feel free to ask.
I hope that you all enjoyed this Instructable! Don’t for get to follow me here on Instructables and to Subscribe to my YouTube channel! Thanks for reading and watching