Welcome, I'm a relatively new forum member too. At a youthful 69, I'm on at least my fourth childhood. I've got a 2017 X300 which also had a 4K limit for 500 miles, but on the 300 that's somewhere between 35 to 40 mph (!!) in 6th. Fortunately, I like back roads way more than highways/interstates, but even so I ended up, uh, taking liberties with the RPM limit, especially after the first few hundred miles. Having over the years read a bunch of the approximately 8577397653 opinions on break in procedures out there, I settled on making sure the bike was well warmed up but never overheated and gradually increasing the rpm, load, and run time through about 300 miles, then changed the oil and filter and just rode normally, but without any extended high rpm stuff, thereafter. I know I'm probably way over thinking the break in process, but that's more or less how I've always broken in new bikes and none ever seemed worse for wear over the years.