Trystan Casey
Building an electric go-kart is a fun project, but it can be time-consuming and challenging. It requires a range of skills, from design and engineering to mechanics and electrical work. The first step is to decide on the specifications of your go-kart, such as speed, range, and budget. Then, you'll need to source the necessary parts, which can be purchased new or scavenged from old go-karts or other sources. It's important to consider safety features, such as fuses and reverse rocker switches, and to ensure that all electrical connections are secure to prevent short circuits. The process of building an electric go-kart can be a rewarding learning experience, and with careful planning and execution, anyone can build their own electric go-kart at home.
| Characteristics | Values |
|---|---|
| Project Type | DIY |
| Project Difficulty | Time-consuming |
| Use Case | Off-road, drifting |
| Speed | 35+ mph |
| Motor Power | 4200W |
| Battery | 60V 80Ah |
| Estimated Run Time | 20-30 minutes |
| Estimated Speed | 40-50kmh/25-30mph |
| Chassis | Off-road, racing |
| Additional Features | Reverse gear, roll cage, fuse, reverse rocker switch |
| Safety Considerations | Electrical circuitry expertise required |
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What You'll Learn
Designing the kart
Designing an electric go-kart requires careful planning and consideration of various factors. Here are some key aspects to keep in mind during the design process:
Purpose and Functionality:
Start by defining the purpose of your go-kart. Do you want an off-road vehicle or one for racing? This decision will impact your choice of frame and chassis. For off-road use, consider a roll cage with an off-road chassis. If you plan on racing, a lightweight racing chassis might be preferable. Additionally, consider whether you want your kart to have a reverse gear, which would require a reverse contactor.
Power and Performance:
Electric go-karts can offer immediate power delivery and a wide power band. Consider the top speed you want to achieve and the power output needed to accomplish that. Keep in mind that electric motors are typically rated for continuous power output, and you may need to manage thermal considerations for sustained high-speed performance. You can opt for a QS135 28KW based kit or a Siacom SIA 155-64 Hairpin motor kit, and throttle the output to maintain optimal temperatures.
Safety Features:
Safety should be a priority in your design. Consider including a fuse and a reverse rocker switch, which can protect against short circuits. Ensure that all electrical connections are secure and properly made to prevent any potential hazards. It is recommended to seek advice or assistance from someone knowledgeable about electric circuitry to ensure your go-kart is safe to operate.
Drifting Capability:
If you plan on drifting with your go-kart, pay attention to the tyre design. Consider using PVC piping on the tyres to aid in drifting and enhance traction loss at lower speeds.
Budget and Resources:
Establish a clear budget for your project. Electric go-kart builds can vary in cost, so plan your expenses accordingly. Consider the availability of parts and whether you intend to build from scratch or modify an existing go-kart.
Remember, designing an electric go-kart is a creative process, and you can customize and refine your design based on your specific requirements and preferences.
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Sourcing parts
Chassis and Frame
The first step is to decide on the type of chassis and frame you require. You can either purchase a new frame specifically designed for electric go-karts or modify an existing one. If you're on a budget, keep an eye out for used go-kart frames or rusty old go-karts that you can restore and modify. Ensure the frame is the right size and comfortable for your height. It's also important to clean the frame thoroughly and remove any corrosion or old paint before starting the build.
Motor and Battery
The motor and battery are crucial components of your electric go-kart. When sourcing a motor, consider its power output and torque to ensure it aligns with your desired speed and performance. You can find motors with different voltage and wattage ratings, such as 60V or higher, and power outputs ranging from 3kW to over 28kW. Keep in mind that going above the rated power output of a motor may not be sustainable for extended periods. For the battery, consider its voltage, ampere-hour rating, and compatibility with the motor. A typical combination might be a 60V 80Ah battery with a suitable motor.
Drivetrain and Brakes
The drivetrain includes components such as the sprockets, chain, and axle. Custom-made sprockets might be required to fit your specific setup. For example, you may need to weld a 12-tooth sprocket onto another sprocket to achieve the desired diameter. The chain size is also important, with #35 being a common choice. Brakes are essential for safety, and a simple disc brake connected to a foot pedal at the front should provide adequate stopping power.
Additional Components
Don't forget the smaller yet important components that enhance safety and functionality. These include a fuse to protect against short circuits, a reverse rocker switch for reverse gear, and a chain guard to protect the drivetrain. It is also recommended to consult someone knowledgeable about electric circuitry to ensure all connections are safe and properly made.
Online Communities and Resources
Take advantage of online communities and forums dedicated to go-kart enthusiasts, such as Reddit's r/gokarts, where you can seek advice, share projects, and learn from the experiences of others. Additionally, websites like Instructables and YouTube offer step-by-step guides and video tutorials on building electric go-karts, providing valuable insights and inspiration for your project.
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Building the frame
Firstly, decide on the material for the frame. Metal frames are a popular choice, and welding can be used to join the metal pieces together. However, welding can be intimidating and expensive if you lack the necessary knowledge and equipment. As an alternative, some builders have used metal conduit and pipe clamps to create a no-weld frame. This method still provides a strong and secure frame without the need for welding.
If you prefer a more natural look, timber planks can also be used to create a wooden go-kart frame. Timber planks should be marked and cut to length according to your design, and then assembled with wood screws. Ensure that the wood screws are securely fastened to provide a sturdy base for your go-kart.
Once the frame is assembled, it is important to reinforce it for added safety. Bolts can be used to secure connectors and join frame pieces together. Additionally, consider adding safety features such as a mechanical brake, a kill switch, and a seatbelt to the frame. These features will provide an extra layer of protection in case of an emergency.
Finally, finish the frame with a coat of paint to protect the material and add a personal touch. Choose a paint that is suitable for the material of your frame, such as a vibrant orange Rustoleum oil-based paint for a metal frame. With a well-built and reinforced frame, you'll be one step closer to enjoying your very own electric go-kart.
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$1399
Electrical components
Building an electric go-kart can be a fun but time-consuming project. It is important to have a clear idea of what you want to achieve with your go-kart before you start building. For example, if you want your kart to have a reverse gear, you will need a reverse contactor.
The first step is to source a go-kart frame. You can modify an old go-kart frame, such as a rusty old go-kart purchased second-hand, or a racing chassis previously used for gasoline engines. Ensure that the frame is the right size for your body and that it is free of corrosion and old paint.
The next step is to source the electrical components. The electrical components required will depend on the specifications of your go-kart. For example, the motor and battery specifications will depend on the desired speed and running time of your go-kart. A 4200-watt motor and a 60-volt 80-amp battery may be able to achieve a speed of 25-30 mph for 20-30 minutes. A QS135 28KW based kit or a Siacom SIA 155-64 Hairpin motor kit can also be considered. It is important to note that going above the rated power output of an electric motor will only work for a few minutes.
Other electrical components to consider include a fuse and a reverse rocker switch, which can add safety features to your go-kart. For instance, a fuse can help prevent a surge of current over 300 amps in the case of a short circuit.
Once you have sourced all the necessary electrical components, it is important to check all connections before turning anything on. It may be worthwhile to get someone knowledgeable about electric circuitry to help check your work.
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Testing and safety
Testing Procedures:
- Before testing, carefully inspect all components, ensuring proper assembly and secure connections, especially for electrical parts.
- Initial testing should be done in a controlled environment, gradually increasing the speed and duration of tests.
- Test braking performance and handling at different speeds to ensure the go-kart can stop effectively and handle turns safely.
- Monitor the motor's temperature during testing, allowing it to cool off between longer drives to prevent overheating.
- Continuously evaluate the go-kart's performance, including acceleration, top speed, and battery life.
Safety Measures:
- Wear appropriate safety gear, including a full-face helmet that meets rigorous safety standards and a karting suit to protect against impacts.
- Understand the health and physical requirements for riding a go-kart. Be aware of any pre-existing conditions or limitations that may affect your ability to safely operate the go-kart.
- Attend pre-race briefings to learn about the go-kart, track, and safe handling practices.
- Participate in hands-on training to familiarize yourself with the go-kart's controls, braking, steering, and navigation in a supervised setting.
- Ensure the go-kart has essential safety features, such as a functioning braking system and, if possible, a chain guard to protect the rider from the chain.
- Regularly inspect and maintain the go-kart, checking for loose parts, worn components, and proper functionality of all systems, especially brakes and steering.
- Keep the go-kart's weight as light as possible to enhance performance and handling, reducing the risk of accidents.
Safety should always be a top priority when building and operating an electric go-kart. By following these testing procedures and safety measures, you can help minimize risks and enjoy a safer riding experience.
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Frequently asked questions
It's important to have an idea of what you want your final product to be. For example, if you want an off-road go-kart, you'll need a roll cage with an off-road chassis. You should also consider your budget and how fast you want to go.
Electricity is dangerous, so it's crucial to ensure that all connections are secure and there is no risk of a short circuit. It may be wise to get someone knowledgeable about electric circuitry to help check your setup. You can also add extra safety features, such as a fuse to protect against a surge of current in the event of a short circuit.
There are various online resources, such as Instructables, YouTube videos, and forums like Reddit's /r/gokarts and Endless Sphere, where people share their projects, offer advice, and discuss tips and tricks for building electric go-karts. These can provide valuable insights and inspiration for your build.
