I bought yamaha Szr on 29 may 2011 and from 1st month its disc brake going rust I told service centre person in 1st free service and they capture picture of disc brake and say me that Yamaha engineer come and see and after 1st sevice its going problem in start and then agoin I gone to service center and they say battery will be changed and 1 full day I spent in service centre they change battery after 2nd free service the bike milage is 22 km per ltr and after 25 days of 2nd service bike not start in morning and I always manually push the bike I told service centre person but still my problem not solved they say to leave bike in night so I checked in morning I don’t know how much trouble these bike give me . I never dream that the so big company Yamaha give me so trouble