[TimM900]

Hi all, just a quick question. I've removed my M900's carbs for cleaning and there's an extra drainpipe or breather appeared. It must have been connected to something carbs or airbox but I can't find what. It's very small, 2mm-3mm bore, black, seemed as if it was connected somewhere high on the left and goes down to the ground on the right. There are 2 bigger breathers that were attached to the airbox, and various bigger hoses to the carbs, so it's not them. I wondered if it is an old battery drain but it's too small. Any ideas? Thanks