So I need a new set for my 02 YZ426 and am too cheap to buy new ones from Yamaha. These are the finned louvres on the front of the radiators. DeVol Guards show the same p/n from 01-05 (426 and 450). OEM Yamaha shows different p/n between 426 and 450. Will the 03-05 450 louvres fit the 01-02 426 with or without a little trimming? Thanks in advance.