I had the whole thing all apart, each of the 6 wheels was off. I just put it all back together again, those parts sure are small. One thing is puzzling to me, to test it out, I used a drill and I had to put the drill in reverse to make the odometer go up. Also, the speedo needle wants to go counter clockwise too. (I don't have any spare parts left over) Tiny, if I use a drill to reset it, I do well to get a half a mile a minute with my drill.
