This question was asked in a forum from a Utah based website. I thought somebody here might be able to answer his question.Thanks in advance for any input. I smoked the crank in my 03 yz450 I was puting it back together last nite. when I went to put the flywheel on, the shaft was to big. Come to find out it was for a WR450 if I get a WR flywheel will it all fit? I really do not want to split the cases again!!! Any help would be great.