So I need to get the 600 mile service done for my CBR250 and the shops around here are telling me it's the standard issue for the oil change $30-$45 or so. But it also needs to undergo a valve inspection and adjustment if needed. Apparently that's about $330 or so in labor. Should I bother to have this done? I'm all for proper maintenance on my bike, but I'm just wondering if this inspection after 600 miles on my valves is really worth it?