Motors Impact on torso?

I scripted this:

Mot = Instance.new("Motor6D", Char); Mot.Name = "Mot"; Mot.MaxVelocity = 0.1; Mot.Part0 = Char.Torso; Mot.Part1 = Char["Right Arm"] Mot.C1 = Mot.C0*CFrame.new(-1.5,0,0);

Mot2 = Instance.new("Motor6D", Char); Mot2.Name = "Mot2"; Mot2.MaxVelocity = 0.1; Mot2.Part0 = Char.Torso; Mot2.Part1 = Char["Left Arm"] Mot2.C1 = Mot2.C0*CFrame.new(1.5,0,0);

When I scripted this to the torso; and took out the old Right Shoulder and Left Shoulder. Nothing went wrong, but the arms were rotating up and fourth wierdly; however when I made Part0 = Char.Head it stopped rotating wierdly and just stood in place welded to head still. I believe it's something with the animation script in character. I want to keep the animations for the legs, but i don't want the animation script to impact my motors.