If you pull off the side panel on the right side, just forward of the battery, you should be able to see the rubber sleeve that hides the u joint.
my guess is there are some posts on how that thing comes out.
Check the right shock boot for tears. Swing arm for cracks. Wheel bearings for slop or roughness. Brake pads for wear, and slider pins lubed, especially the lower one (caliper mount bolt) behind the rubber boot.