Kawasaki’s Z1000SX has been a best-seller for the brand ever since it launched in 2011. It almost single-handedly breathed life into the dying Sports-Tourer genre of motorcycling, offering ageing Sports-Bike enthusiasts an alternative to the unstoppable Adventurer-Tourer juggernaut. Of course, it wasn’t perfect, and has been revised every couple of years since with nips and…