Radiator interchangable YZ/WR ?

[1BLUEsky]

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 !

[trailordune]

03 and 04 wr's have different (bigger) radiators than the yz's.

[1BLUEsky]

Damn. Ive seen small radiators on KAWI MX bikes but when looking on internet pictures the YZs look the same. Thank You