I pulled the stator and nothing looks bad. Drained the oil and I found a small amount of copper in the oil tank screen. The rotor looks fine and bolts are tight too...The thing is I heard a whinning sound the last time I rode it at about 6K rpm's. The shop told me it was the stator not the new battery, or V.R.. All the electrical connections on the stator and elsewhere are good. How does a stator go bad and looks good? I have been running 20/50 motorex and the oil smells like there is a lot of blow by... maybe I should only run 10/50w. It's just hot in the desert. Any feed back?