I've been desperately trying to find a beginner used dualsport for my girlfriend. first biek should always be something you wont be upset if it gets totally destroyed, so used is where you look but there is nearly nothing other than KLR650's in the used adverts in my area. however, there are several bikes that Baja kits can be put on, and i saw the thumper talk special and that got me thinking. so i looked up a few, and i read a few rumors. rumor one: pertaining to 250cc in general, the yamaha wr250F is specific: "I know the F has 5 valves not 4. It really is a different motor. This is what I heard, but not sure if its true or not. That the dirt engines are designed for all this rpm flux of speeding up and slowing down. If you take them on long highway rides it is very bad for the engine." (http://www.advrider.com/forums/showthread.php?t=594318) Rumor two: the gearing is bad for the bikes if taken on long (100 mi) highway jaunts. can this be remedied by sprocket changing or does that gear up first gear too high? Rumor three: they're a lot more maintenance, because they are race bikes. for those that have converted your bikes, what would your input be? what advice do you have? what experience can you share? anything is appreciated.