If you want some real chuckles, hook a real voltmeter across the battery terminals, fire up the bike, and then let it run and compare the H-D gauge and the real voltmeter readings. Then shut it off but leave the key on, and compare readings again as the voltage drops. Not only does it read high at the top end, it reads low at mid range and lower. Another highly precise instrument from the MoCo (I wonder if they pay more than $1 for these things???). BTW - with mine at 2500 rpm, the real voltmeter reads 14.45 volts, and the H-D gauge reads just a hair under 15.0 volts. That's if you assume that the first mark after 14 is 14.5, and the next mark is 15.0, with a full 1.0 jump to 16 to the last mark.
I still think they should have left all the gauges off, saved $10 on manufacturing costs, and given the top brass another big bonus for a job well done. JHMO, of course.
Jerry