I bought a set of MSR rad guards on eBay which were listed for a 2006 Yamaha WR450f. Problem is they dont' fit, and on the packaging it lists them for a 2000-2004 Yamaha WR450f. I guess the 05/06 ones have a narrower rad by the look of it, can anyone verify they are different? Or am I doing something wrong in trying to install them???