Im looking at a 2000 wr400. I rode the bike and really liked it. Its completely bone stock with new topend and new clutch. It doesnt even have free mods. The bike is in excellent condition. Im only worried about reliability. How reliable are these bikes with oil changes and valve checks. I dont ride real hard and only once a week at that. Whats your guys story? Will this bike last me for say two more years with good maint?