This is a new BMW motorcycle sound effects library. I personally really like the overall sounds of this 1998 BMW K1200 RS bike (1200cc, 4 cylinder, 4 stroke, 6 speeds). Use headphones or studio speakers to listen to the demo and enjoy the video.
BMW Motorcycle Store Link
Demo (use headphones or studio speakers)
Behind the scenes from the recording session (also use headphones or studio speakers)