No I don't think so. I think somewhere under some conditions they have a documented and verified number with the engine on a chassis dyno connected directly to the shaft and that their loss calculation can be supported and justified such that their marketing materials showcasing a 165hp number can be supported by clear indisputable evidence...otherwise they would certainly risk litigation. Usually, the discrepancy between advertised numbers and the numbers we see on the internet can be explained by variables that are just not clear (ambient air temp, dyno variances, lubrication, and even tires). I know that even from one dyno to the next under the same conditions you can see 10% variance on the same bike. I am sure that Triumph is not overstating their power number but rather these differences are explained by perfectly acceptable and expected measurement variances. The bike is wicked powerful and probably they are being conservative by a few HP just to be safe. As for telling people how much power it has, you can say whatever number you like it's never going to be 100% accurate (the bike makes less power at 5000ft than sea level, for instance), but I try to be accurate when I talk about such things at the bar so I error on the side of being a little conservative with the bragging. I had mine dyno'd b/c I wanted to know as close a possible what it made to the wheel. With the 171 number, I am comfortable saying it has about 180hp when folks ask. I wouldn't want to say it has 200hp as I don't know that it has "at least" that. For the same reason, you can say 165 in stock form at sea level. It def. has that.