Protaper Race Spec MX Front Sprockets for Selected Kawasaki and Yamaha Dirt Bike Models Size:12T Aprilia had to make some BAR HNAT11 WSA KZXK Aprilia had to make some sacrifices and footpegs were one of the corners that got cut set back handlebar position results in a more relaxed seating position and a more direct riding experience Bike Fitment Kawasaki KLX 250 (2006 2007)Kawasaki KLX 300 R (2003 2007)Kawasaki KX 250 (1999 2007)Yamaha WR 400 F (1998 2000)Yamaha WR 426 F (2001 2002)Yamaha WR 450 F (2003 2022)Yamaha YFM 660 R Raptor (2001 2005)Yamaha YFZ 450 (2004 2013)Yamaha YZ 250 (1999 2021)Yamaha YZ 250 X (2016 2022)Yamaha YZ 400 F (1998 1999)Yamaha YZ 426 F (2000 2002)Yamaha YZ 450 F (2003 2022)Yamaha YZ 450 FX (2016 2022)