So I finally bit the bullet and decided to upgrade my sondors original 350w single speed to 750w 7 speed. I actually completed this by following a similar setup as another thread in this forum. I have a 35A controller, 750 w motor, ktlcdh8 and a 52v battery.
I took the upgraded bike out for its first ride today and boy it did not disappoint. I’d say 15 minutes into the ride. I decided to up it to 5 PAS, once I did that and then hit the throttle, the bike just shut off and would not turn back on. I took it home and checked all the connections, the battery was still at 56.3 V according to the multimeter. I reattached the xt90s connection from the battery to the controller and it created a huge spark and smoke. So the bike won’t turn on, the battery still has tons of juice. Any thoughts?