I've recently been told that my rear sprocket and chain are starting to go. I've been weighing my options and have come to the conclusion that I have no idea what setup to get. I've seen people sell kits that include the front/rear sprockets with a chain at pretty decent prices. 99% of my riding is woods riding which is why I got a WR400F in the first place. So I want a kit that will fit my riding needs. Does anyone have any recommendations. I've been told that PBI makes good sprockets. Beyond that I know nothing. Weight isn't my biggest concern in the parts so much as durability and toughness are.