I was told by my dealer that I need to bring in my YZ450F after the first hour to have the valves checked/shimmed. Is this needed? Can I say, break it in for the hour, ride that day and then take it in? Sorry, I'm new to 4strokes (first one). I'm ask because this upcomming weekend looks to be the first since winter that I'll be able to ride. I may just take the YZ125 out, if that's the case.