You're answering your own question. Was working, now it's not. You say the ball bearing is in hue he other end, but you haven't confirmed that. The clutch adjuster in the left can't be properly cleaned and working if you haven't located and installed the ball bearing.
Disassemble the left side, remove the actuator, locate and clean the ball bearing, and follow the procedure in the manual during disassembly and re-assembly.
The only real trick is to adjust the cable at the cover first then to fine tune at handle bar. When adjusting the clutch screw, just enough tension on the screw is sufficient. The remainder comes thru the cable adjustments.