Thanks for the BMW comments RKWXFD but I beg to differ on the complexity issues. Sans the ABS and the Roadster looks pretty simple. Two cylinders, no shims under buckets, easy access to the valves, no radiator and no chain. I believe fuel injection is simple and would not shed a tear if I never see another carburetor again.
I know Harleys also fit the simplicity bill but I'm not interested.