First off, stupid questions get stupid answers. Period.
Second, I've come to believe that the reason this forums hasn't turned into exriders or bt or others, is because all the morons that come on here asking stupid questions get flamed. And I like that, all the stupid people that we don't need or want, generally get pissed off and don't come back. Now for people that have legitimate questions and really need help, Im all for answering. But if you can't figure out the proper way to ride a 2 stroke, then you shouldn't be on one.
And to answer your question, even when you're cruising stay on the pipe, the engine is most efficient there, and you'll get the best mileage. You stay at low rpms, and the pipe isn't scavenging effectively, and you're wasting a gas.