I'm either burning or losing oil and don't know why. When I put the bike on a stand it drips oil from the thick black tube that's routed down the left side of the frame (after riding, engine hot). When I check the oil after filling and then riding I can't believe how much I've lost. Has anyone experienced this? What the hell is the problem? The bike runs great so I'm very confused. And no, I don't run it with low oil. Thanks for the help.