Just got my bike running yesterday and after just a few minutes the pipe was quite discolored. I know some discoloration should be expected but it is pretty bad! The engine fired right up and seems to be running great (what a blast!). I am using a 16-1 fuel ratio as recomended for breakin, is that to rich on oil? Maybe i need to adjust the air fuel mix? But like i said it is running strong and I'm surprised it is not louder- quiet is good. I just dont want to do any damage or cause premature engine failure. Any help would be great! I also have the needle in the factory setting- I think on the second from the bottom for the E clip.