I posted about the elation I had after I rode my NOS 2004 450 after I uncorked it about a week or two ago. This bike rocks! I have absolutely fallen in love with it. I did have one problem that was bothering me. I had a mid throttle stumble that worried me a little. I hated the fact that I had to lug it for it to be smooth when transitioning from trail to trail on fireroads or rip along at full throttle Half throttle would send the bike into a surging/stumbling pattern that felt like the CDI couldn't make up its mind which timing map to use. Knowing a little about TPS problems on fuel injected vehicles, I thought that this was the problem on my bike. I read about one guys experience with his TPS sensor on his WR on this forum and it really made me wonder. He said that his wasn't set correctly from the factory and just by adjusting it, it made all the difference in the world. I thought to myself that Yamaha would never let a bike out the door with a TPS that wasn't adjusted correctly. Then I thought about the tuning gymnastics that would have to be pulled to make this bike run in the massively restricted stock form. Could Yamaha actually set these up incorrectly just to make them run? Naah, I thought. As my conspiracy theory brewed, I thought about my experience in manufacturing and the thought that this thing wasn't set up correctly reallly started to gel. I finally had the gumption to check it out. I used a couple of paper clips to stick into the leads and tested it per the owner's manual instructions. Much to my surprise, the reading was .48 volts. This was out of spec. I adjusted it to spec and took it for a little spin. Woohoo! this bike only gets better. The moral of this epic monologue is for all of you that have disconnected your TPS or still are having weird mid throttle position problems. Adjust it per the Owner's manual instructions. I reallly think that these aren't setup correctly from the factory. I also believe that by disconnecting the TPS, you are losing some of what makes these bikes so alluring. The technology that changes the timing curve for the throttle position at any given time is what makes this better than an old air-cooled no technology thumper. I'll report the full ride report after Sunday but I know that it is going to be a changed bike.