Can anyone tell me if a radiator off an 03' YZ will fit the same year WR ? I've compared part #s and the only difference is in the third letter. They look so similar I just find it hard to believe Yamaha would make 2 different rads' for nearly the same bike. I'm interested in primarily the left side. I may not be to concerned with shrouds as I'm thinking about putting on an acerbis 3.3 tank and that requires YZ shrouds. Thanks in advance !