I went for a ride yesterday out at Jawbone. I had a great day riding lottsa single track and gnarly uphills and downhills. I was very suprised to see my '05 Wr 450 sucking down two gallons of fuel on a 28 mile ride!! Most of the riding we did was in second and third gear, no high speed stuff. Two of the other guys I rode with had WR 450's and they used about a half a gallon of fuel. It was pretty warm out there but not blazing hot (80-85 degrees) and I'm guessing we rode from 2000 foot elevation to maybe 4000 ft. I'm running the Blue JD needle in the third position, a 168 main jet, 48 pilot jet, and the fuel screw at 1 3/4 turns out. I'm also running a Boyesen Quick Shot and stock exhaust with the Pro Motion insert. I'm planning on putting back on my Big Gun exhaust once I get the quiet core insert that I ordered. I've checked for fuel leaks and didn't find any. The only thing I can think of is I'm running way too rich. But would running the JD Blue needle with a 168 main jet in warm weather at higher than normal altitudes (For me anyways) cause this type of fuel consumption?