Went to take my "71 CB175 out today and found a new problem, I noticed the foot gear change lever on the bike is getting a bit mushy lately, and now it went from mushy to just not returning to the center position. So, if I were to push the lever into first gear, the gear engages and the lever stays down and doesn't return to that mid point ready for the shift into second, same if i go into second it'll just say popped up and not return to the center, any ideas of the culprit? thanks all!