The Chain and Sprocket Kit (T2017220) includes a 104-link chain, 43-tooth rear sprocket, and 18-tooth front sprocket. (Spacer Washers included if applicable.) The old part number for the Chain and Sprocket is A9618024 This item fits the following models Bonneville 790/865 2001-2008 (spoke wheels), Bonneville EFI 865 2009-2016 (mag wheels), Bonneville T100 790/865 2002-2008, Bonneville T100 865 EFI 2009-2016, Scrambler 865 2006-2008, Scrambler EFI 865 2009-2016, Thruxton 865 2004-2008, Thruxton 865 EFI 2009-2015