The top speed of the TVS Draken X-21 250cc is not explicitly mentioned in the available sources, but given its engine specifications, such as producing 38.5 BHP of power at 12,000 RPM and 23 Nm of torque at 9,500 RPM, it is expected to be competitive with other bikes in its class. Typically, bikes with similar power and torque outputs can achieve top speeds in the range of 140-160 km/h. However, without official testing data, this remains an estimate.