I have found that replacing the two washers and roller cage bearing twice a season helps keep the drive sprocket, chain, and axle sprocket stay in good shape. Be sure to use a good bearing grease on that roller cage bearing before each practice or race day.
It is important to pack the roller cage bearing in a good bearing grease, I like Mobil 1 synthetic grease. It is also important to service that bearing before each practice or race day.
