Same sort of interval for my Bandit, I still went in and checked but all valves were at spec...a mechanic friend of mine said to wait until you could hear a slight tick, then go in. Although I just got it and it's used, the Busa's engine is whisper quiet.Took a lil ride to test the valve adjustment (all in spec) so I don’t know why it’s even required. This makes just three valve checks in 62,000+ miles and they’re always in spec. They sure built them right in 06. It’s ninety DAMN four outside and it’s just 12:44 so I’m back home under the A/C.