I just did the same thing a couple of weeks ago. Me and the wife headed out on a beautiful Sunday morning to a destination about 3 hours away. My ride app showed a route that looked much better then taking the interstate. So we went for it. Well after about an hour into it the pavement ended. It was hard packed dirt at first, but then it soon turned into gravel and then rocks. But by that time we were at the point of no return. When it was all said and done it was about 30 miles of that crap. We never went down or got stuck, but it sure rattled you teeth as we would get passed by the occasional side by side or 4 x 4. Needless to say we took a different route home. The bike was filthy but ran fine. Unit I washed it a few days later. I rode down down to my local do it yourself "wand" car wash (I know, I know... that's an entirely different subject) got the bike all cleaned up and took the long way home (about 45 min) and everything was fine. Until I clicked off the ignition switch to coast the remaining 100' to my driveway. Without the motor running I could feel that the bike wasn't freewheeling as much as it should. It never locked up the rear tire, but by the time I made it to the driveway it would barely move. So much so that I had a hard time even rolling it back to get it on the center stand. After getting under the bike... I couldn't see any physical damage anywhere. But I couldn't move the rear wheel at all. After scratching my head for awhile... the only thing that I could assume was that there was sand in the brake caliper or the drive itself. So I decided to get out the brake cleaner and spray the hell out of the caliper. Sure enough... after a combination of spraying it and turning the wheel by hand it eventually freed up and now it seems fine. But I think I'm going to take it apart and make sure everything is clean and in good shape before my next ride. The last thing I would want to do is have it lock up again during a ride in the middle of nowhere. Note to self... NO DIRT ROADS!!!