I have the stage 1 with the advance key, I am running a 16t in front thinking for more top speed, but I did not notice much. ON the bottom end it is awesome. I will be going back to the 15T. WIth the 16T I can out run the YFZ 450 piped for the first 75 feet or so, then he passes on a 300ft drag. I think with the 15 I will get a better chance at the run. He will most likely still beat me, but at least I will be alittle closer.
I am happy with the cam.

 

by the way, the 05's have a 14 up front too.