In March the guys (cousins & brothers, etc.) in my family get together for a 4 day ride. 90% are Poolaris nuts, My little brother owns a 800 zrt and a 600 xcr. My nephew owns an '06 F7. I was ridding my 700sx. After none of them except my nephew could keep up with me, they all took my sled out and his f7. They all came back with BIG sh!t eatin' grins from both sleds. Mine was quicker out of the hole, but that F7 was unbelievable at the top end. My sled was hitting 97-98 mph on the GPS. His F7 was doing 120's. the first ride I took on the F7 I pinned it from shore, by the middle of the lake (with the skis still up in the air) felt like was doing 85 or so, I looked down to see the readout at 115! And it still had throttle left! I love my sx, and plan on riding it for a while, but that F7 was awesome. BTW, my little brother zrt, besides riding like a bucket of bolts, wasn't as fast as my sx.
Earlier in the season on a nice cold day (0° or so), my sled hit 105, after letting it unwind all the way. I bought 700 sx this year as well, and as far as I can tell the only mod is a thin head gasket.