Hi everyone. On my way to work I had my headlight on and my bike stalled. When I got home had the bike ticking over put the head light on and flashed main beam when I did that the rev counter dropped to 0 but the bike still ticked over then when I released the main beam after only a second or so the rev counter went back to normal position. When I did it again the bike wanted to stall. Is this a bad earth as the battery is okay. Thanks in advance.