Trüpower Motorsports Kawasaki 2005/2006 KFX400 ATV Premium Direct Replacement Ball Joints are manufactured to meet or exceed OE specifications following rigorous quality control and product stress testing. Trüpower ball joints stabilize the suspension/steering system so your ATV continues to perform the way it was meant to perform. Plain and simple, our Kawasaki KFX400 ATV ball joints are built to last so you can work hard and play even harder.