Motorcycle Consumer News (MCN) tested the S in their August 2005 issue. BMW finally fixed the fuel injection. "(It) pulls cleanly from below 2,000 rpm all the way to the rev-limiter at 10,750." So, is it faster than the busa? No. The MCN dyno reached 135hp. "The busa has a 25hp advantage in the mid-range and 15 on top." MCN compared it equally to the Honda CBR 1100XX (Blackbird). The measured top speed was 172mph.
MCN described the engine as "amazing." 50mpg, 0-60 in 3.17 seconds, and "very muscular low in the rev-range." The transmission now uses a multi-plate wet clutch, which is much better than the Boxer dry clutch. The adjustable ESA suspension "offers a level of convience and functionality that has been previously available only on luxury/sporting cars." I can vouch for the adjustable suspension when I took a twenty minute ride on the S. It's just incredible.
They didn't mention the weird turn signals. And they panned the lack of a centerstand. One tester said "We can't think of another bike that can go so quickly, for so long, with such composure." Another said "Think of the S as a remarkable sportbike that is comfortable enough to be a great sport-tourer as well."