i beat a early model srx 7 with my first rmk. they all need some set up to be truly potent.Bone stock mach z's are not all that fast. I've beaten them with my 00 600 ves if they slept. Only a few guys i know with a lot of setup, and tuning experience were able to have really fast ones. You go back to earlier late 90's mach z 800's they were even slower. 800 twins today would kick their ass.