2000 R1 carbureted, stock. Didn't want to start today. Turning over good, seemed like only one or two cylinders were popping. Previously was hard start if not ridden in a month. Plugs original on 25K miles. Has run perfectly after warmup. Question is this. At 25K, the valves are supposed to be reshimmed. Looks like a mess to do, timing chain comes off, etc. Pulling plugs are a part of that valve job. So if I tear this bike apart, am I going to see everything still in tolerance? Should I just replace the plugs? What is everyone seeing on these bikes as to when the valves are NEEDING shimming? I'm scared about some idiot (me or hired) getting a valve tight and killing a great running bike that just needs plugs. Any experienced opinions?