Hi all, I ride an '02 XR400R that I have had since new. A few weeks ago, I was on a ride in the mountains and lost the drain bolt from the oil reservoir in the frame. It vibrated out while riding, I must have not tightened it well enough after the last oil change. Needless to say, I lost nearly all of my oil on the trail, but I had no choice but to ride back to my truck without oil or be stranded in the woods. After several miles, I could tell that the motor sounded different, but I kept on until it sounded really dirty like something was going to break inside, at which point I stopped and started pushing it. Long story short, I ended up getting a tow from an ATV. But I am wondering if any of you might take a guess on what kind of damage I might have done? I filled her back up with oil when I got home and everything seemed to be running ok. But I went out again this past weekend to Rasor Road, where there are lots of sand hills, and 3rd and 4th gear just felt like they were not coming together correctly when I was really gunning it up these hills. I would describe it as "muddy" in the gearbox, like the way it feels when you're about to stall out from being in too high a gear at a low speed. It would also sometimes not shift into 3rd gear when I was really gunning it in 2nd. The loss of power was substantial from these issues. I also noticed a light grey film of residue on the end cap to my exhaust pipe that smelled like burnt plastic. What did I damage? Clutch plates? Gears? I am not too familiar with the inner workings of the gearbox. Thanks for your input, you guys have been a great help over the years!