The original complaint "check for dog clatter in 1st, 2nd, and 5th. When shifted into 5th gear, will not stay."
It came in for transmission repair. He opted for the 2014+ undercut transmission upgraded gears. The upgraded 2014 gears come with a 1 year unlimited mileage warrantee.
Dog clatter can be heard in the vid below. It's important to know that it can happen under various conditions besides what is shown in the vid. Many blame dog clatter on bent forks; however, it is more likely caused from a worn fork, or a shifted shift drum. Bent fork(s) on 5th gens is more of a forum myth.
All transmission problems in 5th gens are related to dog wear. It's also know as ghost shifting. Dog clatter is one of it most sever forms of what happens when a ghost shifter is not repair in its earlier stages. Basically, dog clatter happens when the rider rode his Wing 1 mile too far.
https://www.youtube.com/watch?v=lcsvcWcF3hk