Skeletal Mesh little flickering while moving

Hi,

like described above when i move my character he starts to flicker but just on some parts of the body.
I´ve tried many different ways of exporting importing.
Enabled disabled shadows and light.
Adjusted the Bounds scale.
But nothing helped.
So if anyone caould tell me the solution it would be really great.

There you can see what exactly i mean

Best regards

mamouf