You can tell if you front springs are worn out by how much resistance they give you when you hit the front brake or when you hit a bump. If you notice your front end is diving in the corners and you feel the bike bottom out when you hit a bump, it is possible that your front fork springs are worn out. Another sign is if you notice your motorcycle is not sitting evenly, or your motorcycle tires are not wearing evenly. These are also signs your fork springs may be worn out.