I have a bike with a Yose Power conversion kit on it. Recently I changed the tires on both wheels and ever since there has been a weird motor (or at least it sounds like it's coming from there), it kind of sounds like a chugging noise, it happens at random times, more often when I am going fast, but the sound is always consistent. I did attempt to take the motor apart and everything seemed fine. It is also a front-wheel drive if that for some reason makes any difference. I am not sure why this is happening and would appreciate it if anyone could give me any advice on what the issue could be.