Had to find the wiring guide in the other listed review, and then figure out the speed switch wiring after googling it. Use for upgrading a 24vdc razor kick scooter, and powering it with (3) 18Vdc power tool batteries. Swapped out sprocket, and was easy to change. Insanely powerful (easy to wheelie and will throw off a 170lb rider) and fast (up to 25-30mph easy), great runtime (est 10mi or more distance). Motor runs very cool temp. Excellent value, would work great for an electric gocart.