I've had my Raptor 660 for about a year and a half. I have replaced the swingarm bearings and axle bearings just about two months ago. About a week and a half ago I noticed that when accelerating, the fourwheeler, "leans from side to side a little bit" is the best way to describe it. It will pull to the left then right like it is unstable and it won't hold a straight line, but the front wheels are straight, just made sure today. And the front wheel bearings are still good. Will the linkage bearings wearing out cause the fourwheeler to feel unstable and not hold a straight line? The front tires are pretty worn, about half tread, but I didn't think this would cause the problem. Please only respond if you know what you are talking about.