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This is true , but don't chase no splooge on a dirtbike too hard. My GP bike NEVER splooged, but no matter how I jetted my dirtbikes they splooged. jetting is only optimal at certain throttle openings and load situations. on the GP bike I was WOT full load 80-90 percent of the time. On a dirtbike it is constantly changing, meaning that you might enjoy optimal burn 10 percent of the time or less. In fact, often time dirtbikes run better in rich condition as they have more grunt off the bottom and run a lot cooler. Different animals, and very different jetting goals IMO.