I wanted to post this as a warning for others. I have a 2020 XR acquired in August 2020, and just recently the right handlebar bar end weight / bolt fell off while riding on the highway. I had never previously touched the bolts (didn't even have the right T50 bit).
After I had the new set put on by my local dealer, I double checked the left side and it didn't have threadlocker applied by the factory. Considering how much vibrations this bike has, this seems like an oversight!