I have a friend that worked as a mecanic at the local honda dealer. He now opened his own bussiness and is extreemly busy and doing well. I stopped by his place and asked him about the valve check at 600 miles. He went out started the bike run the R.P.M.s up and down and said he could check it for me but it would be a waste of money. Stated that it would start hard or the engine would be noisey if the valves were out of adjustment that far. I now have 2600 miles on the bike and the engine is still guiet, starts right up, and runs great. If i didnt know this guy i would say hes full of B.S. but he has a great reputation and knows what hes doing. The dealers wont tell you that , they wont turn anybody away, they need the $$$$$$.