ok so i had a 500w 36v ebike but i found out it was too slow. Then i got a 1500w controller . When i first installed the controller, the rear hub motor which is a cheap chinese brand ran backwards and made a strange sound so i guessed it wasnt connected right. So i didnt changed the hall wire or the big 3 phase wires instead i found this video online that said by connecting the self study (learn) wires it would configure itself out. So i did but what happen is the ebike went out of controlled , and crashed. When i pick up the e bike and flip the bike ,the hub wheel wouldnt spin right by spinning it by hand. I tried dropping it on a another bike but when i spin it spins rough and it doesnt spin for a lot maybe like 2 spins max by hand i checked the dropouts and its fine. I also checked gears and they work great? could it be the bearings, axle or motor, I havent tried reconnecting and actually running it with power yet after the crash.