I have a 1999 zr700 with 1200 miles on it. It's getting about 7 mpg and was really slow. With the recalls done (yellow green spring, cdi change, rejetting etc. ) it performed a little faster but the fuel wasn't much different. I read in SnowTech Magazine about a place called Dakota Performance who claimed to have a clutch kit to get the sled to 12 mpg and 5 sled lengths faster but I cannot get a hold of anyone there. Does anyone have any idea what to change on this sled. What jetting, needle, clutch weight, helix spring etc. should be at. What pipes needed. (Specific brands on all parts) I would like to see this thing perform like most say it can.