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    Super73 Z1 - Grintech Baserunner Build/Mod

    Hello, I have the same issue and would like some assistance since I am not to keen on electric bikes. I purchased a nonworking Super73 Z1, with a bad battery. I purchased a KT mosfet 9 controller, LCD 8HD screen, and a 48V 30AH battery. Everything works great, but after like 3 min of driving...
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