Recently purchased two moscows for myself and my brother. for a couple of weeks all has been fine. Now after our last trip , my brothers bike will only accelerate to 21.7 kilometers and hour with throttle, even with peddle assist The battery is fully charged and showing 4 bars on battery and 6 bars on display , the speeds are just not there anymore. i have taken pics and video and sent off to customer service here in canada . i was just wondering if anyone else has had this problem.Later today i am going to take my battery to his place to make sure thats not the problem. are the display and controler easily removed? that way i can trouble shoot by using my display and controller to narrow down where the issue is.