Clutch stopped working after 8 mi into a ride yesterday. I cannot sqeeze the clutch handle, there is too much tension on cable. Cable is fine but I cannot rotate the pin assembly that sticks out of clutch cover that is connected to the cable. The pin assembly can usually be rotated when pryed with a screw driver but it will not move now. Seems like somehting is preventing the springs from compressing. Any thoughts apprciated before I tear it apart.