I am using the yamaha fz for more than 6 months, its a very good bike, self balanced, better, afety, stylish, offers comfort rides, I went a tour on this bike a total of 1000km, I did not have any back pain. but you have to adjust the tappet every 15000km or once im a year or else in cold areas the bike gives worse fuel efficiency and power, sometimes the engine would not even start bike to ride awesome experience riding this bike good looking stylish bike its very good bike for the youth of the india it has good mileage and power engine and also handling and controlling is good and comfortable and brakes and tyres to control awesome