The '12 motor/trans I had was a bit hard shifting, e.g. took effort to change gears and wasn't very smooth. The '16 motor/trans installed 2.5 years ago is even worst. As a matter of fact it shifts so hard that you couldn't ride it with a pair of tennis shoes on, takes just too much effort. I've ridden other K bikes and their trans shifted very smoothly. My local dealer doesn't offer to much help, e.g. yes it shifts hard but it's a positive shift. I'm contemplating taking the trans to a gear specialists. I've found one I trust in NC. But it's gonna cost... Anyone else having very hard shifting problems? Ever find a remedy?