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Custom Electric Dirtbike 30KW Motor 67Ah 72v LiFePo4 Battery - $4,100
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The motor is a 30KW QS180 motor with an 11:49 sprocket setup with 530 chain. Makes about 400ft-lb at the wheel. Easily goes 70mph and could go faster if you changed the sprockets. I have a 13 tooth front sprocket that can be put on as well. An similarly powered commercial dirt bike would be the Altis Sigma.
Wheels are 21" front and 16" back. There isn't room for an 18" on the rear, unfortunately. Uses a Fardriver ND721000B controller and JK 300A BMS. Has a DNM rear shock and E-ride pro SS front forks. Both fully adjustable.
I am selling because I wanted to use this for trail riding but it just doesn't have the range that I wanted, even with this 67Ah battery. It will get about 50 miles riding at a fast pace. Could possibly get 70 if you were gentle with it. It would make a great dirt or street track bike.
Open to offers, or a trade for a Polaris Ace 570.
Video of it running: https://www.youtube.com/watch?v=8sxt73eJVT4