What I'm getting at is for mere mortals, it's not really any different than the service interval for a stock motor. That's why I said to look at the race kit manuals for other OEM's, even the Japanese bikes need rebuilds around that time for race/track use if you go by the manufacture documentation. Here is a screenshot from when I had a CBR1000rr from the HRC manual. That's about as boring and vanilla a motor as you can get and it basically needs to be re-done every 3700 miles according to Honda. All the other OEM's are similar. So no, it's not any more of a headache than any other bike is. It's just that they are actually openly admitting what race use service intervals are. Some of the kit manuals are even listed in hours instead of miles. Now do normal people like us go years at a time between rebuilds? Sure, but we aren't WSBK riders.