My 2012 Vee seems to be running fine. However, when I start rolling from a start I hear a clicking sound coming from the rear chain/sprocket area. I stopped and checked the chain and it was loose. I usually keep the chain at 1"-1.5" of play. I adjusted it to those specs, but it still makes the clicking noise. I can't see anything else wrong back there, but admittedly, I'm no mechanic.