Carburetor for Suzuki RM125 (1975-2007), RM250 (1976-2008); for Yamaha YZ250 (1978-2002). Carburetor for Honda CR250 (1973 & 1997), CR250R (1978-2008), CR500R (1984-2001). For Kawasaki KX125 (1974-2005), KX250 (1974-2006, 2012-2013); Main jet #160, pilot jet #55. A direct replacement: requires no modification and will start right up. Inner diameter of outlet side: 38mm. Please be sure to check the sizes to confirm if it fits (pwk series have many sizes).