Since it is very similar to the 1600 it replaces, the Yamaha has an edge here, both in support from the manufacturer and from the aftermarket. There are lots of accessories available for both of these motorcycles' predecessors. However, the fact that the Yamaha 1700 is more like the 1600 than the Kawasaki is to previous big Vulcan Classics means that there is a larger existing accessory supply for the Road Star. In addition, the significant changes to the Kawasaki may discourage aftermarket vendors from creating new products because a history of frequent change means that they are likely to have relatively short lives. Finally, the quality of accessories for the Yamaha also appears to be somewhat higher.