Ok, we go riding one day, get back late, next afternoon go to get the Yamaha Beartracker off trailer to wash, and the rear wheels will not budge. Put it in first gear, hit gas, just revs up. Same in reverse. I didnt see anything stuck in wheel, nor did we have any problem or hear any noises while riding it the night before. Surely having the sand dried on there for a day couldnt have done anything?