So, I own this quad I bought new in summer of 2004 maybe 2003?? I forget. I did NCVQ needle, 42.5 pilot and 172 main jet with no lid and a DR D. slip on from week 4. I did cam mod after about a year or 2. I never adjusted or measured valve clearance ever.. It still runs amazing like new. What are the chances of this happening. All I have to do is tap the start button and she lights right up. Still stock titanium valves etc. stock head, 6 or 7 sets of tires and no issues. Ever.