I love getting you guys riled up! One thing I did forget to mention is that going to YZ timing will have little or no positive effect on power while using the stock exhaust with the insert. This is due to the exhaust restriction not allowing the formation of a negative pressure area to allow for scavenging. That said there is a very simple reason we compare our 520's to your little 450's, aside from the ISDE the two machines will almost always be raced against one another! Why shoot yourself in the foot twice once by buying a450 and one more time with a blue one! As far as that goes isn't the most common defense of that dog WR that it is so smooth and user friendly? If so then the KTM 450 much be a lot better in most of your books! I'm sorry (not really) to disappoint you all but the new WR450's are dogs as far as drag race type power is concerned. I witnessed first hand one being out ran by a 02 YZ250f on multiple occasions! That is sad! I wish we would have run it against the 03 250f that was present to see how bad it would smoke it. Darrins 99 had no problem at all running with this 450 and edged it out a few times. 520 was in a different zip code by the time they got into 3rd gear! Not even a fair race looked like a geo metro facing off with a LS1 vette! I do agree with the WR's power being user friendly at least as long as the user doesn't want a trophy! Sorry that is just the facts of life!