Yamaha RX100 is a better option if considering a used bike between RX 100 and 135. It is lighter, quicker and the best RX motorcycle made till date. It uses a 2-stroke 98 cc engine producing 11 BHP and 10.39 Nm of torque while the transmission mated to the engine stays a 4-speed manual unit only. The power to weight ratio stays very high and the motorcycle attains a top speed of 100 kmph.