Trail Tech || TTO SURFACE - TACH/HOUR
I have one similar to this mounted atop the upper triple clamp. It's not too big and has the useful accumulated hour feature.
Installation was a breeze: Pick a mounting spot and attach the unit with the included double-sided tape.
Next, simply run the one wire down to the front cylinder's spark plug wire, wind the end around the plug wire, secure with a bit of tape and you're done!
There's a small button in a recess on the back of the one I have to set the sensitivity.
One should probably do that engine on before sticking it down with the mounting tape.
I didn't, but got lucky in that respect. =)