This is a tip that motorcross bike owners pick up on very early. Even if you are just a street rider, it is a good habit to develop. Most modern streetbikes have sealed bearings that are relatively maintenance free but the exposed areas, like the suspension linkages need to be greased. While you are checking the grease on your bearing, also notice if they are becoming wore. Even with proper routine care, there will be a day when you have to replace the bearings. While you are greasing up your bearings, you might as well lubricate your bolts as well. Bolts like the swingarm bolt, linkage bolt, and motor-mount bolt can also benefit from being properly lubricated. ;