Maximum horespower is achieved through a specific air fuel ratio. If the mixture is too lean, you lose power, and the exhaust temps increase. If it's to rich, you also lose power and (depending on how rich you go) start fouling plugs, developing deposits on the valves, and clogging converters. Most manufacturers will have the air fuel mixture a touch on the rich side to be safe from the heat generated from the lean condition, so simply "tricking" the computer into thinking the intake air is cold so it will dump in more fuel (and then blocking that message from the o2 sensors) will not necessarily make more horsepower.
I also am the type of person who's looking for more powerin everything I own, even though I'm really happy with the performance of the 1800. This product, in my opinion is like many others out there that say you're gonna go fast by tricking the computer into thinking it's cold outside, thereby dumping in more fuel. I've been building horsepower for racing 1/4 mile way to long to know that it's not that easy. If you could hook the bike up to a computer and custom tune that fuel curve to maintain a specific ratio, I'd say it may be a different situation, but simply dumping in more fuel is not the answer IMHO. I'm saving my $50+ dollars on this one, but if someone puts it on their bike, let us know how it works !!!