finally after almost a year riding this bike with 4k+ miles it started giving me issues. this is the CS20 ebike in started giving me issues at 4k meliles. The problem I'm having is that the throttle cuts off while riding. after the 7th or 8th time it cuts off the bike dies completely and there is no power. it will not turn on. it turns on when I plug in the charger. the voltage reads 52v when it turns off. battery is 72v. this happens after about 10miles in.