i am thinking about buying a new 2007 model my dealer still has for 4599.....but this bike seems to be a real pain in the a**. i heard you have to check the valves and crap like that a whole lot and replace them...im not racing it, jus gonna go for rides in the pasture, probably wont even jump..so do i have to do all of this valve checking? is the crf250x the same way?