2008 YZ450F 470 BB kit for supermoto?

Im trying to get some input for my 2008 yz450f, im coming on 92 hrs and for the winter i was going to rebuild it as i run alot of supermoto with it and dont want to blow it up. Im looking at putting on a Lukes racing 470bb kit, ht cams stage 2 cams, some head porting and a new crank. should i get a bigger carb or get the current carb bored out to match the bb kit for topend, also should i get it balanced? Id like to get more ummpfh to keep up with the newer bikes and not spend 8k on a bike.

Am i heading in the right direction?

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