Appereny the common killer of these year yzfs and yfzs was they had unsufficient lubricant to the lower end. In 2007, yamaha engineers changed the cases around so there was a little jet to keep the bottom end lubricated. I've read that sometimes the effects can be expensive and brutal, costing easily 3 grand to repair. Has anyone ever done this oil jet mod done? I want to know where I can get this so-called jet and high pressure oil pump and do it myself.