Yamaha rx100 is a good bike in milage and power but I personal thinks if any one using it for there profesion work like dilivering things, dairy business any business like this can use this bike for best use.but as a personal use dont buy at all this bikes create a lot of noise will driving and disturb others.
In personal use the average of this bike can cost much more than other modern bikes but if you are looking for a bike that can customise into new looks this can be a good bike for you I guess.