Create a gritty, vintage-style t-shirt design featuring a hand-drawn sketch of a retro motorcycle with intricate details that highlight its classic character. The motorcycle should be the focal point of the design, showcasing its vintage essence. Above the graphic, place the text "Dhaka Riders" in an angled, distressed font that complements the rugged aesthetic of the design. Utilize muted shades of grey, maroon, and burnt orange to create an old-school, rugged look that resonates with motorcycl