right on... my only experience dragging against a Z was a pretty much an all the bolt ons bike with cams and a high comp piston and i killed him, but my 450 has the same stuff as him so i wouldve expected it. I would have to see a Z beat a 450 to believe it. im not saying youre lying im just unsure of the bikes potential and i cant see one with out heavy mods example: big bore stroker etc... beating a 450, even a stock one but who knows.