Yamaha rx 135 usually used by people or teenagers only to fulfill their passions except that there is nothing involved in this bike if you want your bike to come for the long period or you wish your bike would have more life-span or more life?.then this bike is not for you as it will destroy the decent environment usually when I was studying the college times many were using this bikes which would created the hell lot of sounds and the vibration the college premises many of were using it only for passion and style but inside this bike there is nothing and also there no proper mileage to this.another disadvantage is that there high release of the emission where there is chances of creating of air pollution.