Can anyone tell me why I can't make my animation play faster than normal speed?

Unity Engine
1

Here’s my code below. I can get the animation to run at increments of the main speed but any time I go over 1 it doesn’t go any faster.

		clipReverse = new AnimationClip ();
		clipReverse.name = "reverse";
		curve2 = AnimationCurve.Linear ( 0f, 0f, 1.0f, -1.0f );
		clipReverse.SetCurve ( "", typeof ( Material ), "_MainTex.offset.y", curve2 );
		anim.AddClip ( clipReverse, clipReverse.name );
		
		anim.wrapMode = WrapMode.Loop;
		
		if ( currentClipName != null  !currentClipName.Equals ( "" ) )
		{
			foreach ( AnimationState state in anim )
			{
				//state.speed = conveyorBeltTransform.GetComponentInChildren<ConveyorBeltTrigger> ().conveyorBeltPower / 55;
				state.speed = 10;
			}
			anim.Play ( currentClipName );
			
			
		}
2

Does State.speed just not work?