whatever you do DONT use the belray gear saver in the trans, if you do youll be shopping for a clutch very soon.
I apologize for ripping on you, but do the math... Belray (manufactured by whomever) sells hundreds of thousands of quarts of "Gear Saver" oil every year to lots and LOTS of people around the WORLD.
However, one person has a problem with his clutch on a Yamaha Blaster and that oil becomes "Not good oil" and recommends to everybody he knows not to use it because his clutch got glazed. Seriously? Really? Come on now.
Remember that ATF has friction modifiers in it that improve "Grip" in a automatic transmission. My guess is that there was, or is something up with the clutch. Anything is possible. That ATF might be masking a simple problem that needs looked at.