Yeah, the only thing dual discs do is dissapate heat, the stopping power is unchanged. Most custom bikes use single, low side mounted brakes to show off the beautiful front wheel. Similarly people like to do suspension changes and maybe triumph said, "why have a nice set of shocks on the shelf after our customer changes ride height so we'll just put these extra crappy ones on". Or maybe it's something else. If it's to keep production costs down, I'm Okay with that because it's hard to find more bang for your buck and impossible when you consider the "cool" factor.
