Can you turn the starter clutch drum by hand either way clockwise or counterclockwise?
If you can, does the center shaft turn with it? Do you feel any resistance when you hand turn the starter clutch drum?
BTW from the pic you posted, it looks like you have plenty of clutch pads left on at least two of the clutch starter shoes I can see.
I still recommend you contact Handy Bikes as they are a dealer for hero mopeds and can probably be of help in determining the problem.