Alright, thinking about this and doing some math, it comes out to the 2000 Mach Z ( 572 lbs DRY ), a 2000 ZRT 800 ( 561 lbs DRY ), a 2004 ZR 900 ( 506 lbs DRY ) and an 2004 F7 EFI ( 460 lbs DRY ). Mach Z 150hp, ZRT 800 150hp, ZR 900 150hp, 2004 F7 EFI 140hp ... and with these weights it comes out to:
1. 2004 F7 EFI... has 1hp for every 3.29 pounds
2. 2004 ZR 900... has 1hp for every 3.37 pounds
3. 2000 ZRT 800... has 1hp for every 3.74 pounds
4. 2000 Mach Z 800... has 1hp for every 3.81 pounds
according to the weight to horsepower ratio it is a mathematical certainty that with the identical conditions and weight of driver, a bone stock machine, the F7 is the fastest of the bunch, it 100 pounds lighter then the ZRT and Mach, and only produces 10hp less, but yes the F7 and ZR900 are both twins, twins will take the hole shot, but tripples are known for less torque and more top end, I watched several drag races between a 1998 Mach 1 700, 2002 ZR800, 2004 F6 EFI, 2001 XCSP 600, and the ZR 800 would kill everything mid lake, but the Mach 1 would be in second and easily pull by the ZR 800. so mathematically the statistics speak for themselves, now you have to figure in the hooking up, the aerodynamics (who can get lower, and put more weight to the track ), but if I were to be asked without doing the math I would say the Mach Z, an 800 tripple, same with the ZRT 800, they are some nasty machines, I am still in dilemma, but I can fight the facts. :dunno: