Originally Posted by binman41
Higher resolution of machined crankshaft, If you lookat the hole and then directly underneath it you can see the change in colour to the machined face, this is where I tink the surface has broken up
That is hard to say. Many cranks have blueing on them from the forging process. I am not sure of the 8GS, but I would be cautious to take the blueing as a heat stress on a crank.