I was riding my RX-1 northern WI, just came off a lake and onto a very bumpy trail and all of a sudden I was hearing/feeling a grinding noise. I felt right away like gears were not messing. I popped it into reverse, same thing. After switching from forward to reverse a couple of times it seemed to "pop" back into gear. Happened again the next day, did the same thing and it ran fine. I plan on taking it in to have it checked but thought I would ask if this is something others had seen.