When I bought my '04 WR450 earlier this month, I was pleasantly surprised with the owner's manual the dealer gave me. I was expecting a generic owner's manual like the one I got with my Yamaha Grizzly (I think that manual tells you where the handlebars are and where to sit ) However, the 450 manual has quite a bit of information re: maintenance, torque settings, engine specs, etc. For those of you with the true service manual, are there benefits to throwing down the extra $60/70/80? I seriously doubt I will ever tear my bike down to the frame, so do I really need to spend the addt'l cash? What are the advantages of the service manual over the owner's manual? Thanks in advance.