TE510 clutch failure to disengage

A friend of mine has a ´05 TE510 for sale. I like the bike but noticed that the clutch does not fully disengage and neutral is hard to locate. I asked the local Husky dealer about repair cost and he said anywhere from $400 to $800 labor and parts depending if the problem is the hydraulic pump or the clutch plates or both. Another friend has told me that it is a common repair to just add a ball bearing on the piston at the end of the push rod for a simple fix. This rod runs across the motor from the pump to the clutch. Supposedly many KTM´s have the same problem. Has anyone tried this fix with a Husky?

Edited: Mechanic pulled the rod and installed a washer on the end of it (on the clutch side). Problem resolved,