Here's more info on the Merlins Thermometer
Below link should take you directly to the proper thermometer site.
Note: The thermometer snug fit onto a base with a flat bottom.
Using a double sided tape on top of the HONDA emblem will do the trick.
Multi-Purpose-Tape-Screw-On-with-Traditional-Black-Thermometer--Fits-Road-King-Tank-and-Flat-Panel-More_p_68.html
My local repair workshop must have given me the wrong production year - so sorry for misleading you. Mine looked just like your picture when I got it. After an hour or so on the buffer wheel and a retouch with a black paint - it came out exactly like brush finish.
The allen screw torque is 17 ft/lb
To avoid scratching the chrome caps, use an exact blade to remove the caps.
Good luck.
Let's see some pictures after completion