Riding my HT last week I was aware of a clicking from somewhere in the transmission which seemed to occur in any gear. Had a quick look and noticed some play in left hand HT 2 bearing . When I got home I took the crank arm off preloaded the plastic widget and result – play gone. Went out for a ride last night and the clicking was still there so this morning determined to bottom it ,I thought I would take the chain off.
Oh Dear, the connecting link plate was actually broken on the inside so still looked fine from the outside.
I worked out I must have done about 40 miles on the two rides with the chain held together by one plate.
I will look much closer next time honest!