Yamaha RX100 is a two stroke 98cc light vehicle.It touches a top speed of 100kmph without any boring. The bike handling is superb and under control. Its initial push cannot be awarded by any 4 stroke machie. A man who look for decent milege rx100 is not an option. The milege will decrease as rash as you drive.
As the weight to power ratio is too small it is difficult to control at higher speeds. As it is stopped production in 1996 the avaliability of spare parts will be the main problem. Proper maitainance and care needed for this bike. To get actual rx 100 feeling go for japan made engine ie., Buy the rx of 80s. Even if the milege is poor the crystal clear sound of this beast is enough to break anyones focus.