I never really knew I could add a parking brake on my ST or CTX or even my GW. However, there were many times on those bikes when it would've been VERY handy. My wife was still riding with me on my GW and there were many times I came to a stop and had to keep both feet on the ground to hold the bike up so the only alternative is to learn how to hold the front brake and apply throttle at the same time when starting up again. The newer bikes with DCT come with parking brakes. Now my last 2 bikes have been super scooters and those actually come with parking brakes. The one on my Burgman 650 was on the left side under the nose of the seat, but my AK has it in a much better location... just below the left reservoir is a lever that, when toggled to the left, would apply the parking brake.