My super-cheap handguards have arrived and they might fit without fouling on the fairing
However, using the patent motorcycle manufacturer 'build from the inside out' technique, it appears (from the manual) that the only way to get the inner weight out is to release a tab from the outside of the handlebar tube. This would require taking the grips/throttle tube off and seems idiotically complicated
The handguards need the weights supplied in order to fix them into place so
You need three hands! Remove the end weight and screw, with a couple of small screwdrivers or needle nose pliers you need to squeeze together the internal clip which should be staring at you as you look at the end of your handle bar, screw in the end weight screw (you've removed) and use this as a puller, as you squeeze the clip together pull hard on the screw and out it should come. Try not to damage your weight screw. There is no need to remove your grips. Picture below of remove unit.
Ho