The controller is the BIG expense in an electric kart- look at golf kart sites for pricing to start then go to youtube or similar for what others have done.Very torquey from a standstill. You'll need good car batteries at the least.Depending on your controller voltage you'll calculate the quanity of batteries needed in a series, then you get to figure out where to put them.Usually the weight is so much that most electric karts are limited to smooth flat surfaces.There's a lot of potential for speed -immediately with electric.
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