Just finished up the 7500 mile maint on a 2008 Hyper valves and belts. Job actually went pretty well and was easier than I thought to do. Rented the kit from Desmo Tool Rental and was definitely the way to go. Nice people, good instructions, and everything we needed except belts and orings. Valves we're alittle tight and within spec but decided to adjust seeing we had tools and shims in the kit.
Belts were slack after the 7500 miles and 10 years and would not register on freq meter at all. Interesting to note the last thing the bike did in the fall was a track day. It appears as long as the belts are not overly slack and flapping around there is probably no way they would jump a tooth just because of the way they are run and position of the rollers. That's not to say they couldn't fail with age and time??
Having seen this we wanted to pay better attention to the tension this time. While we had the MotoReva frequency tool we wanted to find an app that would do the same thing so we could check the tension whenever we wanted. After alot of trial and error we found an app "Easy tension" for bicycle belts that matched up exactly with the readings we were getting with the Desmo Tool meter. It takes 3 readings and then averages and ended up being almost identical to readings on the MotoReva tool. Planning to check tension after maybe 1000 miles to check for initial stretch and then periodically on the way to 15000 miles. Pretty easy to do and with a phone and app even better. Hope this helps others as well. After all of this IMHO belt tension is not as critical as I once thought. I feel as long as you have some tension you should be good as evidenced by a track day on slack belts?? Either that or I am really lucky!! Either way with the app there's no excuse to not check belts periodically. Good luck and tight belts!!