03 yz250f supermoto conversion help?

What would be the easiest and most affordable way to turn my yz250f 2003 into a supermoto bike?

Buy a 450. The guys around here who are competitive are on 450s.

Otherwise, get a spoke kit and swap the rear rim to the front and buy an 18" rim and and spoke kit for the rear. Lace em up and put the fat tires on there. Swap in a WR250F tranny and re-gear slightly lower (larger rear sprocket) for more pull. Send the suspension off to have the forks and shock modified to reduce suspension travel slightly.

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