Hi guys this is the real problem which I faced in my discover 100m. The old model of discover was good comparing with the new model of discover after just a year the engine starts misbehaving and stats producing a irritating tik_ tik sound. The pickup of this bike is the poorest. On hilly areas even on single riding the bike starts vibrating. This is true that this bike provides a great level of comfort and superb milage but though this bike is not reliable at all. It just starts vibrating at a low speed of just 50 kmph. I will suggest that this bike is just a waste of money with no power and no control. Buy another bike instead this