Welcome to burgmantrikes, There is only 3 kits available for the burgman, Danson which most agree is the best and the latest one. The Tow Pac and the Voyager which have been around for a while. I did a lot of research when I got mine and the Voyager was not recomended, but I never tried the others so I only know about Danson which was desinged for the 650. What kind of kit do you have on the GW, Thats what I want some time, but love the Danson. Wayne