The Harley-Davidson Road Glide by Surui Motor Garage is a rolling piece of tattooed art wrapped around a modern performance bagger chassis.

Harley-Davidson Giraffe II is the work of a Swiss custom crew called Bundnerbike, follows in the footsteps of the original from years ago.

Harley-Davidson didn't become a cultural shorthand by accident — it built a reputation one mechanical turning point at a time with new engine layouts and design innovations. Some of those bikes became ...