These are definitely needed with the Acerbis 23 litre tank to be able to turn your bars from lock to lock without you flickers hitting your tank. They raise the flickers up above the ‘ horns ‘ of the tank. You might still need to restrict your turning circle by drilling and threading your bump stops and inserting a small screw that will now allow you to adjust each side to avoid tearing a hole in the tank with the triple clamps. You will probably find that the stops are unequal so being able to adjust them is ideal.
This product can / will be hand carried to Royersford, PA and posted from there.