honestly it doesnt take much to total bike.. specially if owners want it totald... the shop can write forks off.. tho you cant tell there bent.. but some dont want to take chance.. sometimes u start fixing bike for insurance and then find other stuff.. the u need supplement.. and that supplement might total bike and u be stuck with parts(far as shop goes).. so they will write some things that may not be damaged.. watch engine cases... sometimes when u take covers off stator or clutch.. the engine cases will crumble apart at bolt hole.... thats one thing. next is frame, subframe. frames can have scratch.. there is no painting them for shop.. they just replace them.. so scratched frame can cost $3k plus labor to replace.. but for racer.. thats no big deal. biggies are frame, subframe, swingarm, forks, wheels, engine. everything else can be easily replaced.
if i was buying one i would walk around and check it closely. ihave bought salvaged bike b4, but i knew what happened in wreck and it was just cosmetic stuff. but we did have busa that was close to total and got parts, and when engine cover came off the cases fell apart from crack.. it totaled it. also sometimes u cant see fairing stays bent or broke.. tho u can get race one.. just something to check