$8. gets new bucking bar, cam lever & ball bearing. Looking at these parts that all have to work together isn't the answer. These parts may look fine but the three of them combined will be more than enough to cause problems. Where the bucking bar makes contact with the ball bearing some concavity wear may show. Also the housing that holds the clutch arm in place may have excessive wear to the case housing causing the cam to contact the bucking bar at a very slight angle & this also increases friction on the opposite end of the bar. A few points of miniscule wear at multiple points can result in a clutch that won't function. That little cover plate is also just a few bucks. Install parts and readjust clutch if that's not the solve then you move to the pressure plate side to search for buggers...use plenty of lube on all the bucking bar assembly components, they wear out quickly when run dry at both ends of the bucking bar rod.
Let us know how it's coming these tiny clutches take a beating from most China girl riders & fixing problems often requires replacement parts. I put about $ 30. worth of parts in a clutch a few years ago and that covered every internal component of the clutch (including the components previously mentioned) except for the large gear and pressure plate. One hour labor and it was running fine. I never knew what the problems were but I'd wasted several hours over several days trying to solve the problem with adjustment, when the real problem was worn out. I suspect the $8. parts would have fixed the problem but I was tired of jacking with it!
The first $8. is what I would try first and normally will solve clutch problems that are non adjustment related when a clutch won't release the pressure plate from the clutch pads. if that's not good for a fix order the rest including the large gear bearings.
Wish you a quick and easy fix!
Rick C.