in order to put a WR crank into a '03-'05 YZ450, you have to use the WR ignition cover , flywheel, stator, AND crankcases. Might want to reconsider. Hmm....perhaps I was assuming the swap was essentially the same as the 06+ swap requiring: Ignition Cover Flywheel Stator Clutch Arm CDI Battery Regulator but not the cases themselves. Based on your comment it seems like the 03-05 swap is different? Either way, I likely will not proceed. If there was any way to put the WR crank in now and still have the option to do the rest of the swap later, I would still consider it. But since it is an all or nothing proposition, I agree that it is not worth it (at least not now).