1. So you are saying a stop watch used to time a bike over a given distance is not accurate? Why not? More likely those guys were making excuses because the supposedly "newer and better" bikes weren't as fast. Reading up on open class mx bikes, you'll find they have been de-tuned over the years. The fastest ones (stock) ever made date back to the mid '80s. 2. Totally agreed, these are dirt bikes, so it's a moot point which one has a higher top speed. Still fun to debate, though. 3. "ported and piped". By who? How do we know they did a good job? Maybe it had less power than stock? Dyno runs to back it up? More magazine mumbo jumbo. I hope you guys don't make any IMPORTANT decisions based on dirt bike magazines. 4. I really think the magazine article, and some of you guys for that matter, are a bit biased. I should be biased TOWARDS the 650, but I can't ignore common sense (and science) to tell me the real answer.