Engine block discoloration

[johnny_pepperoni]

Hey guys, just wondering if any of you experience a discoloration on the engine's surface? Mine is at 16,000km and i can notice a slight discoloration on the sides of the engine.

 

[Ralph]

Nothing on the engine at 10000 miles but a touch of rust just were the mirror storks go into the mirrors,
it's a 2014 bike so in it's 3rd year.