you failed to mention how many race miles on the bike, seems your north of 5,000 miles now.
You're correct - the bike is just north of 5000 miles. 2017 was not a great year for my on-track mileage record as I spent a lot of time running the local race club, and less time racing in it.
I got 3 solid days in at Road America this past summer, and I'm looking forward to doing that again in 2018. Heck I might even grid up and race there, we'll see.
My bike has been a racebike since, literally, mile 7. The dealer assembled and test rode it and I rode it exactly 1 mile before taking all of the street equipment off and converting it to a racebike. The engine was broken in on a dyno, and I went to the track and rode it as intended from that point forward.
5000 miles doesn't seem like a lot, especially compared to Jessika, who's pushing on 100K miles on hers, but these racetrack miles are hard miles.
Some things I'm doing - I'm always ALWAYS warming the bike up before riding it. As soon as I get to the track I'm starting the bike, letting it get to about 180F and then shutting it off, letting the metal heat soak and warming the whole engine. Before the first session I'm warming it up again. There are a bunch of different metals in there (steel, stainless steel, aluminum, brass, bronze etc) and they're all engineered to work with the engine being warm. They expand at different rates as they warm up, so it's important, especially with the racetrack where we ask for all of the bike's power output, to make sure all of the metals are in the appropriate temperature range before we ask too much of the bike.
I'm changing the oil very frequently - like every race round (generally a few hundred miles). While I view this as precautionary, and very likely overkill, in "race bikes past" I've found that this little bit of hands-on activity helps me find issues before they become problems. Everything from something as big as hunks of metal in the oil, but the engine hasn't let go yet to something small like a hole that's developed in the exhaust during the last few hundred miles that can be easily welded now instead of replacing parts later. As the old saying goes, an ounce (or about 3.2 quarts) of prevention...
I'm pretty anxious to get back on track. '17 was not my strongest riding season and I'm really looking forward to improving that in '18. I'm lucky that I get to coach at the Yamaha Champions Riding School in the winter time, and I've got one of those in for this off-season already. Looking forward to going back to AZ in January and hopefully making a few more riders love the sport even more. It's good for my mental health too, at least according to my wife, Sarah, who says I'm less "jerkish" if I get to ride during the winter.
Like I said before, I'm really happy with he 899. I'm starting my 17th season of track riding / racing in 2018 and in that time I've not owned a better bike. Can't wait to ride it some more!