Bajaj CT 100B is one of the best bikes in terms of durability .my uncle had this bike for past 10 years or more but still the engine is quite good in condition .He had a retail shop much of loading works are had with it but still works as smooth as butter.It is also oil efficient as its milege is above 60in worst condition also .do not go by its simple design if you want a durable bike with a good milege, then I would suggest you for this bike