I installed the BMW brand handguards to my G 650 X Challenge this afternoon. Took all of 45 minutes to an hour. I am very impressed with the build quality of the guards. They fit up exactly as they are supposed to and there are no surprises along the way. Weird, but the instructions actually made sense as well!! Here's the kit with the large handguard protectors that I opted for: First, I installed the protectors. They slide over the bar and screw into it with the supplied bolts. The holes are threaded and line up perfectly. I started on the left guard. Cut a hole for the threaded mounts. Here is the threaded mount installed: Now install the bar end, bolt, and guard loosely to the bike. Then install the inboard bar mount with the bolt, supoort, nylok nut, and other bolt. Once everything is installed loosely, align them as you want and tighten. I used loctite on all bolts except the nylok nutted one. Note the three different sized allens!! Left side complete Throttle side is a little trickier but not really. Cut hole and then roll the grip rubber back on itself to reveal this: You need to cut the end of the throttle tube off to this point: I cut from the hole on the end and made pizza cuts. I then removed those pieces. Aftr this I just shaved back until I had enough clearance to not bind with the bar end after install. Threaded guard mount installed. Note that there is still quite a bit of grip rubber at the end. After install, I cut off the lip at the end as it would not allow the grip to rotate without binding. All done. Here you can see the final trim of the grip rubber: Hope this helps for those who go this route.