I printed and installed this GoPro mount for the windscreen of my BMW R1200GS.
This design mounts a GoPro Bluetooth Remote to the 28.5mm diameter handlebar on the bike using the standard adapter clip that came with my remote (the clip slips on a wrist strap). A custom thumbscrew and tightening wrench were modeled to allow for mounting between the closely spaced riser blocks on the handlebar.
(1) M5-0.8 stainless nyloc nut (thumbscrew)
(1) M5-0.8 40 mm hex bolt (thumbscrew)
(2) M4-0.7 12 mm stainless button-head screw
(2) M4-0.7 stainless nyloc nut
The Onshape design document is provided should you want to modify.