A couple weeks ago, the weather was nice enough to start my XR. It has always ran great, but it began smoking just after I started it that day. It still runs STRONG, but there is deninately oil coming out of the motor. I rode around town for a half hour or so, and it didn't stop. I was hoping it just burped up a little oil and it needed to be burned out of the exhaust. I was not that fortunate. It is deninitely using oil. I've done a search and can't find any info on the issue. Help!