I recently bought a 06 wr450 stock, but with poor maintance (dirtyoil, hole in air filter). After short testride tore down top end, mic'd everything, everything in mid to tight end of specs. 1 tight valve, no leaks with valve gas leak test. Same time rejetted JD red needle 5th from top, 165 main, 165 starter (stock), gytr 48 pilot, stock 50 leak, zip ty fuel screw 1.5 turns out,JD thick o-ring. Runs somewhat better than my drz400 kicker, handles better, but i'm only getting 25-30 mpg on forest service roads 10-50mph. The drz got 45-50 similar riding. Ride 7-10k ft. Forgot, did greywire, airbox snorkel and cutouts, peashooter removal. Plug is black. Do i have a jetting issue or is this normal? Would live with it, but the black plug tells me I'm rich ? And it feels rich. Thanks, searched with my limited skills and better than half way through a 12-pack, couldn't find an answer.