I"ll try to answer the questions here. If it's static, it's an enormous amount of static. I don't have any medical implants and shouldn't have any metal particles in me. I have a desk job and always have so I don't think that would have anything to do with it. I understand how electricity works and this baffles me just as much. I don't know what path it's completing but the only thing I can think of that makes sense would be post controller and following the path to the motor, where it ends, which would also make sense it's on the right side where your foot is close to the motor wiring. I also get the shock fairly strongly through the rear brake lever, I think it was worse. I was trying to slow down and I couldn't keep my foot on it and had to use my front only. At first I thought it was in my head, numb foot or something but if I ride with my legs on the upper rear pegs, I can ride just fine, no shocks. It's quite uncomfortable on the bottom ones. This happens with gloves and thicker soled shoes. To me it feels like AC but I think it's hard to say. I've been shocked by house current while doing projects and also on cow fences when I was younger. It doesn't feel unlike house current and not far off on the strength to be honest. I've pulled my bike apart and inspected all the wiring looking for anything exposed but haven't found anything obvious. I also thought it could be possible that the motor could have some type of internal short, grounding to the motor casing and then looping back, hitting me on the way.