AlphaMoto Black Swingarm Spools Yamaha Yzf R1 R6 1998-2017 Yzf-R1 Yzf-R6 The listing is for One pair of Black spike aluminum swingarm spools with 6mm mounting bolts will fit : Yamaha YZF R1 1998-2017 Yamaha YZF R6 1999-2017 Yamaha YZF R6S 2006-2017 Bolt: M6x50mm