I'll play devil's advocate. Dyno's vary. An example is my bike pulled 165hp on a dynojet inertia dyno. The same setup pulled 142hp on a factory pro eddy current dyno. Also, your friendly dyno operator takes a temperature measurement and a barometer reading at the time of the run. These numbers are used to determine a correction factor that adjusts the reading to approximate what the bike should do at sea level at some standard temperature (I don't know what temp). The idea is to make readings on different days with different conditions comparable (as in apples to apples). Your operator in Colorado most certainly used a correction factor to compensate for your altitude, so your readings should theoretically be comparable to readings under different conditions. Naturally, I wish the factory pro dyno had read more in my case, but the reading is an inherent difference in the way the dyno works. That's another topic altogether, as it's longstanding debate among dyno folks. The bottom line is that the dyno is a way to see the effect of mods that you may make, and if you use the same dyno, you should be able to see what the difference is. The magazines use the highest dyno readings that they can get, and I suspect that they are playing around with the correction factors to hype their results. They are likely in bed with the bike manufacturers. In addition, I have seen examples of magazine test bikes that were highly tweaked and "dialed in" by the factory to get good results by the magazine reviewers. Finally, there can be variances between bikes of the same make right off the showroom floor. Some bikes are hotter than others. You have to ask yourself "Am I not getting enough power out of this monster?". Don't get to caught up in the max hp readings. (I must admit that I do, as well).
