I have been riding hondas since the 1970s. The other day I was riding on a smooth area when there was a buzzing sound and the machine rolled to a stop the engine runs fine and it shifts through all the gears but it won’t move it tries to move a little forward and reverse. I average over 4000 miles a year. It only has 12000 miles. I usually trade at 16000 miles. Any suggestions before I start tearing it down? In 40 years this is first time I’ve ever had to walk home. I’m a rancher and quit horses 30 years ago.