Well I have been contemplating buying a new WR450 for the last 6 months. I broke down and bought a 2012 last night and like most people was less than impressed with the performance in stock form it was pathetic! I currently am riding a 09 KTM 530 in the woods and a 07 kx450 for track and dunes. Both of those bikes have lots of power on tap at all times. So of course I cannot leave this WR450 the way it came! The first run is stock, as in .3 miles on the bike and nothing molested. The second dyno run was with the throttle screw removed. Third was with the silencer gutted (no pea shooter, no arrestor.) I have a fmf power core, ecu, and tuner coming for it next week. If I get a chance to get it on the dyno again I will post the results. Bike only has 1 mile on it right now so I'm sure it will loosen up and gain another hp or two as well. The dyno I used is our dynojet 248, its made for cars and trucks but it measures the acceleration from one speed to another to calculate horsepower so it doesn't really matter what we put on it. It's definately hard on the little motors like a bike but I only did a short run in the peak HP range of the motor. Bike was also run in 3rd gear as to lessen the load on the motor as well. So If someone else has dynoed the same bike and got a different hp great! This is just to show what the gains are with each mod, it doesn't really matter what the actual number is. I took the bike out in the field next to our shop after the last run and I must say I am already impressed with the response of this bike. It doesn't seem to really like the mods right now with the stock ECU and mapping. I didnt put an O2 sniffer in it yet but I'm sure its pretty lean.