In the "Kadena ang Motor" vlog by Sir Geybin, he humorously explores the theme of motorcycle riding and the various experiences that come with it. The vlog often features funny anecdotes, challenges related to riding, and interactions with friends or fellow riders. Geybin uses his signature comedic style to highlight the joys and mishaps of being on the road, while also emphasizing safety and camaraderie among bikers. The overall tone is entertaining, showcasing both the thrill of adventure and the humor found in everyday situations related to motorcycles.