this weekend i was at florence and i was riding my 4 mil up comp hill breaking in the new cylinders and the bike starts to flip out of know where i was like what the hell and stopped it but i turn around to see my tire rolling down the hill so my friend and i fixed it and put it back on the nut must have vibrated off and the cotter pin snapped i guess so for 4 miles we rode it back to camp no nut or cotter!