Imported character animation is rotating

Hi!
I am having a problem with animation that is rotating. In Blender or 3ds max animation seems to be ok, but when I import it in Unity, it has some rotation over time.
For example running slide character animation. In Blender it is running straight, but in Unity it is slightly turning left with every loop.

 

Show a video or images of the mistake in Unity and how it should be.
Rotating and turning are completely different results than if the character is slightly deviating from the straight line animation - which I suspect is what is really happening.
Regardless - on the motion file (animation) adjust the parameters under root transform until you get the results you desire.

 

Yes, you are right, it is slightly deviating from the straight line. Here is video.

 

I had this happen recently and stumbled across the solution by setting the Root Motion node on the animation. See http://docs.unity3d.com/Manual/AnimationRootMotionNodeOnImportedClips.html