Got in 70 miles this weekend on the new F7 and my ZR 800 and I am depressed. I have the 800 setup to run dead with a 900 I know because I have run quite a few dyno's out at 155 hp. Stock they are neck and neck. Ran the F7 a few times. Mind you it only has 20 miles on it. the 800 jumps out of the hole by two sleds then the F7 goes by and gone. As far as handling it is a little squirrelly but I think it just needs to be dialed in. So the moral of the story is good good bye to 800 and 900 and I will be snowchecking a F9!!!!