Cruising through Ohio on Interstate 35 towards Blue Ridge Parkway when I pulled off the interstate to a stop light. Everything was lovely. Lightly accelerated upon a green light and then suddenly a loud tapping noise from the engine bay that sped up with the RPMs of the engine. Sounds like broken valve stem or broken lifter causing valve head to strike piston head. Towed the bike to Middleton Cycles and they will not be able to get to it for 2 weeks. So much for my Scenic weekend plans. Anybody else have a similar problem that can diagnose based upon the above?