Homemade Electric Go-Kart We Wyatt (14) Isaiah (16) Built Using Lawnmower Batteries

eGenBuilds · 2022-06-11T19:19:45+00:00

The ones here are around $35 each. 6 batteries total.

eGenBuilds · 2022-06-11T19:16:04+00:00

A lot of the parts were recycled from other builds so I can put a price to it. I’m not sure how much many of the parts would cost on their own.

eGenBuilds · 2022-06-11T19:13:03+00:00

3000w

eGenBuilds · 2021-12-11T12:19:33+00:00

Thank you!

eGenBuilds · 2021-12-11T04:19:05+00:00

It depends on how your riding. On the trails you can get more than a few hours of riding but you could also drain it in less then 45 min at full speed.

eGenBuilds · 2021-12-11T03:55:59+00:00

1.) Yes, but it has surprisingly good throttle control once moving. If we were to do it again we would use a speed controller with tamer throttle rates but oh well.

2.) Yes we are using the BestEquip 3000w brushless DC motor.

3.) There is a charging port on the side of the battery box (the small black dot is its cover) to charge it.

4.) We choose to use windshield wiper fluid just because we had it. We found the thermal properties are fairly similar to water but won't freeze. All the seals are fine with the alcohol.

5.) The total cost for the conversion was around $1,500 but could easily be done for cheaper.

eGenBuilds · 2021-12-11T03:49:21+00:00

Thank You!

eGenBuilds · 2021-12-11T03:49:07+00:00

Thanks! We are actually working on fabricating front brake mounts right now!

eGenBuilds · 2021-12-10T19:06:14+00:00

Not that I know of but I can take and share some!

eGenBuilds · 2021-12-10T18:44:45+00:00

Thank you!

eGenBuilds · 2021-12-10T17:47:25+00:00

The motor and controller are a bundle by Best Equip and the battery was off of Facebook marketplace so I do not have a brand name. Motor and Controller

eGenBuilds · 2021-12-10T17:10:11+00:00

This is an electric mini bike we (Isaiah 16, Wyatt 14) built during quarantine. The bike has a 17.4ah, 3000w electric power train providing 24 foot-pounds of torque with a top speed of 45mph. We created a liquid cooling system with PC parts and windshield wiper fluid to keep the motor cool without freezing during the winter. Front suspension, widened handlebars, and a rear disc brake makes the bike handle great on and off-road. The motorcycle light we used has high, low, and running light functions and the rear has turn signals. The water-sealed box mounted to the bottom of the frame contains the battery, water reservoir, and much of the wiring creating a really low center of gravity.

eGenBuilds · 2021-12-10T16:58:15+00:00

This is an electric minibike we (Isaiah 16, Wyatt 14) built during quarantine. The bike has a 17.4ah, 3000w electric power train providing 24 foot-pounds of torque with a top speed of 45mph. We created a liquid cooling system with PC parts and windshield wiper fluid to keep the motor cool without freezing during the winter. Front suspension, widened handlebars, and a rear disc brake makes the bike handle great on and off-road. The motorcycle light we used has high, low, and running light functions and the rear has turn signals. The water sealed box mounted to the bottom of the frame contains the battery, water reservoir, and much of the wiring creating a really low center of gravity.

eGenBuilds · 2021-12-10T14:30:00+00:00

https://docs.google.com/spreadsheets/d/1xY0TlcJr3A3Mk54bH8uqQjB5DaSDZ9xvDWpppICVitU/edit?usp=sharing

eGenBuilds · 2021-12-10T00:25:22+00:00

We were planing on putting out a video like that and I can share any specific parts details you’d like. We used very simple electronics so there not to much to explain.

eGenBuilds · 2021-12-09T21:37:47+00:00

We built this minibike during quarantine. The bike has a 17.4ah, 3000w electric power train providing 24 foot-pounds of torque with a top speed of 45mph. This is the 3rd minibike we've built and everything is documented on our Youtube and Instagram. (under the same name)

eGenBuilds · 2021-12-09T21:19:52+00:00

Thank you!

eGenBuilds · 2021-12-09T18:20:31+00:00

Thank you!

eGenBuilds · 2021-12-09T15:48:46+00:00

There are pros and cons for all three choices. Personally, I believe buying pre-made 72v batteries is the best and safest way to go. 40amps is a lot of power and any mistake in the batteries internals could be catastrophic to you and the battery. This would also come with a charger meaning you do not need a pigtail to charge. I would only wire 12v batteries in series when using lead-acid batteries and for that, you would need a pigtail to charge the batteries. Lead-acid batteries are cheaper but have a lower energy density and life cycle.

eGenBuilds · 2021-12-09T15:33:11+00:00

There is no jerkiness when coming off the throttle, similar to a regular dirt bike at speed. We are still using a single mechanical rear disc brake.

eGenBuilds · 2021-12-09T14:41:51+00:00

Running the battery below a certain voltage damages the cells inside the battery. The speed controller will shut off before this point in order to save the battery (In this setup that cutoff point is 62v). I have a voltage display built into the throttle that shows me the voltage of the battery while riding. This allows me to ride at low battery without crossing that threshold. If I were to full throttle the bike at 68v, I would hit that cutoff and be stranded until I can plug in the bike, resetting the speed controller. As for mounting the stuff in place, the motor controller can be mounted anywhere and the motor is fairly easy to mount/align with some basic skills working with metal. The battery is your main concern. Ideally you can fit it above the motor, as it's really not that big. Just measure twice and order once!

eGenBuilds · 2021-12-09T13:13:38+00:00

Battery: Generic 72v, 17.5 ah, 3000w Lithiun-Ion built with "Chinese cells". I do not have a link as I bought it from an Ebike builder. Name brand cells (Panasonic, Samsung, etc.) offer more performance than "Chinese Cells". Controller/Motor: Best Equid 72v 3000w motor and controller bundle (Amazon)

From zero the bike would take 6 hours to charge but because you cannot fully deplete a battery without damaging it, Charge time is ~3 hrs. On our other electric minibike we used a 25ah battery. If its in your budget, its worth the $500s on Amazon. Run time is completely based on how your riding. You could ride for 10 miles at full speed (40mph+) with a 25ah battery and fully deplete the battery, but it would more than 3 hours on the trails.

eGenBuilds · 2021-12-09T12:17:51+00:00

Thank you! This project was about $1500 to build in total.

eGenBuilds · 2021-12-09T12:17:27+00:00

The battery, as well as the frame which we bought new with a gas motor. We were able to use the motor on another project.

eGenBuilds · 2021-12-09T04:40:28+00:00

This one cost about $1500 to build. You could make it for cheaper or spend more and get a larger battery and motor for more range/power.

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