I just replaced my clutch drive sprocket and the needle bearing on my Husqvarna 36. The old clutch drum sprocket was pretty worn, so the replacement was necessary. I purchased the new parts online. I put the new needle bearing on after greasing it liberally, and I noticed that it had a plastic race. Should I be concerned? The old needle bearing was totally a metal assembly. Are all the new bearings made this way? I would hate for it to go south on me when I am in the woods. Any thoughts?