I finally got a chance to test the automotive multimeter from harbor freight.
I had to loosen the tank in order to reach the spark plug wire. Meaning take the two bolts out and slide it back off the rubber mounts in front. Didn't need to disconnect any wires, cables or hoses, but I do have a raptor petcock so keep that in mind.
At first I put the sensor coil too close to the ignition coil and the readings were not steady at all. Once the sensor was sitting on top of the spark plug boot and the arrow pointed toward the plug the readings evened out. On the 4 cylinder setting the reading is half the real rpm, verified by Moofed's Exhaust Audio Recording Visual Analysis™.
The meter read 60-61 (x10) and analysis revealed about 1236 rpm (103 exhaust notes in 10 seconds). That is just slightly above spec for idle speed.
Diamond Jim, in your kamikaze air filter endeavors you mentioned that the deturbulator tubes mitigated the rpm drop when letting off the throttle sharply. That interests me because my bike (Mac exhaust, drop in K&N filter, no snorkel) gets really close to stalling at the current idle speed setting. Not that I want to make my idle speed lower (because of oil pressure concerns), but because I've learned to give baby the throttle when letting off it. I'd rather that mental capacity be available for emergency braking than keeping the engine running.