The one on the left hand side. It's weeping oil, and my oil consumption has risen. I have tried searching through the parts fiches on Bikebandit, but to no avail. I know this breather goes to the airbox, but whats inside the cover, and I have been draining the airbox, which doesnt seem to give out any more oil than when new. I have searched my haynes manual and I havent found jack about it.