I bought CBZ xtreme double disc last week and its awesome . I have done 500 KM’s with in 6 days and completed my first service. Thanks a lot for every body here in mouthshut for your reviews. However I have a small problem with this bike, hope u could help me. So here it is---> The engine sounds absolutely smooth but when I cross the 50 Kmph mark I feel more vibrations in the handle bar. Even 100c bikes are smoother at this stage I wonder how it happens to a 150cc bike. Can some body help me on this??