For all of you auto clutch geniuses. What do you think?

[3-wheelin]

I have a 225dx that makes this exact clutch noise as in the video below. Is this normal? If not, maybe a clutch rebuild? The bike does not have many hours on it and they clutch adjustment is perfect.

Any ideas

http://www.youtube.com/watch?v=WM6thzLpR6U

I also wanted to mention that is only starts to make this noise after the oil heats up. When I first crank it things are quiet as can be.

[3-wheelin]

The oil I am using is Yamalube 10W40.

[ATCrider42]

Sounds like something hitting the inside of the case. Im definitley no expert, though.