2004 wr450f takasago sm wheels on a 2012 wr250r?

Hello all, this is my first post and I'm an admitted tech tard, so with that said here I go........
As stated in the title, I've got some excel takasago sm rims from an 04 wr450f. I'd like to fit them to my 2012 wr250r, but not sure what all is involved. I can find all kinds of threads for 450 dirt tires to a wrx and vise versa or wrx/wrr swaps but absolutely nothing for my particular situation.
I tried the easy way and just got bearings and bearing spacers for 250 figuring if they didn't fit I'd have a spare for future maintenance. Well now I have a spare set. Yay.
This being my first venture into wheels  (other than changing rubber) I'd like to hear from someone who actually knows what they're talking about as apposed to my usual hit or miss method. My local shop is great for parts and scheduled maintenance but not exactly top notch at thinking on the fly for "custom" aplications.
I'm assuming my only option now is new hubs which I also assume would mean new spokes? Or is there a possibility I can find a set of bearings with proper dimensions?
Thanks in advance.



For clarification, if it helps at all, the outside diameter of 3 bearings is way to small to fit in the hub and 1 rear bearing is to large to fit in the hub.

I do not have first hand experience with this but some members have reported putting 2004 yz/wr forks on their bikes, those forks would let you run the front wheel.

Unfortunately I sold the rest of the 450.  I thought about that 2 weeks to late.  starting to look like cl for the takasagos and some saving for new set. Hubs n sprockets looks like around 6 hundo if I can have all new for 2 or 3 hundo more why no have all fresh gear. Not what I was hoping for. Thanks for the reply though.

Well it's no mater now. Tore my acl so I'm up the creek with no paddle for at least 6 months. Thanks to the few that responded.