My bike started to "golden" when brand new. After 500 miles the AI and snorkel were gone, carb mods, Uni, and different pipes. Never was a problem again. I cleaned it off with Semichrome before the bluing got too noticeable. Bike now has 15000 miles on it and no discoloration.
It starts turning golden before the bluing starts. If you get if off early it's a lot less work. From the factory the bike is way too lean and runs too hot. Properly set up (air/fuel) the double wall pipes should not turn.
