Raced my 2011 WR in a fast hare scramble on sunday, pretty open track so i was cranking a bit.. I have done al the free mods, Put the jets in the come with the AIS removal kit, took the spark arrestor and baffle out of the factory exhaust, otherwise stock bike..I ran out of fuel at 33 miles and had to switch to reserve.. the bike runs flawless, starts up easy and never misses a beat.. i dont remember the jets that came with the kit, im thinkin a 48 pilot, 165 main?? Dont remember tho.. I was pretty disappointed with the fuel mileage, even riding it hard that seems to be a pretty crappy range.. From some posts it seems everyone else is gettin better mileage.. Im not in a hurry to mess with jetting since the bikes runs so well.. any ideas??