I’ve been listening to a maddening creak on the Fuego for some time now. It got to a point this week where it was driving me crazy – it sounded like somebody jumping up and down on a creaky spring bed whenever you put power through the pedals. It was difficult to tell where it was coming from because the frame amplified it and it seemed to come from everywhere at once!
I started dismantling the bike bit by bit until I found the guilty party. It turned out to be one of the Allen bolts through the swingarm assembly. A bit of grease and retightening solved the problem nicely.
One to remember to check if you get similar issues.