I am personally having Yamaha Fz since 5 years. Bike is very good apart from a puff sound which sometimes comes while driving. This is some internal fault which is not getting corrected anywhere. I have shown this many times in yamaha service station and even outside mechanics are not been able to identify why and from where this sound comes. Otherwise this bike is very cool, smart and balanced. But I hope this will be cured by the company by diagnosing it properly.