2004 450r rebuild case question.

[fast1500]

how can you tell if a case on a 2004 450r is bad? the crank bearring went out and want to know if i need to buy a new one or not, and what do yall think of this motor set up? what do yall think it will cost to rebuild? thanks

Je 12.1 3 ring piston

oem cyilnder

new valves

oem honda crank (updated)

hrc cam 2004

ported head

uni filter

sparks exhaust.