Getting in to replace that clutch drum bearing looks a royal hassle and may not fix the problem anyway. Will probably just keep using it until it self-destructs.
It's easier than you think MM ,you undo 4 bolts and remove the circlip then get the clutch drum out and the bearing, if the bearing is
worn out ,but you could just find an old 2 stroke 52cc line trimmer at a tip shop for $10. and use the shaft assembly from that..
Cheers
Max.
