I have a 55 tooth rear and 14 tooth front sprocket specialties set of sprockets. They are high grade aluminum and with proper care can last a long time. they will fit all models of gsxr's 600, 750, and 1000 01-05, they may fit 06 07 and 08 models i'm just not 100% sure. They are brand new in the box never been taken out. . $130