Just went over 15000 on my 09. Did the oil change and replaced the chain less than 500 miles ago. Last couple days it has felt as if the take off power has disappeared. Today, as I was coming into work it almost sounded bogged down through the first three or four gears, when I gave it a little more throttle it seemed to rev more than it should almost like the clutch wasn't entirely engaged. I'm not mechanically inclined in the slightest so before I run to the service center that'll charge me an arm and a leg just to look at it, I'd like an opinion on what this might be. Bad gas...bad clutch...tune up time??? Help please.