Fuel Gauge and the IMU

[JTL]

I filled up with fuel yesterday with XR on the side stand, once I’ve paid my usual practice is to swing my leg over it, haul it upright and turn on the ignition and up goes the fuel gauge to full.
Yesterday I turned on the ignition with it on the side stand. Watching the fuel gauge it stayed resolutely empty. My first thought was; the fuel sensor was buggered (As happened on my Caponord 1200 when the ethanol ate the float and it behaved as above). I started the engine on the side stand, still stuck on empty - more cursing. Sat on the bike and as I pulled it upright the gauge ramped up to full!!!

I haven’t checked the manual to see if this is a feature, but I concluded that the gauge is connected to the IMU and only registers when the bike is level.
That’s quite clever imo.

[scotti]

Not quite as clever as that, it is just that the ECU only checks the fuel level periodically, so if you're at the start of its checking window when you turn on it might not read the fuel sensor for up to, I believe 2 minutes.
All normal.

[Martin]

Yep, thought mine was faulty the first time I filled up, stayed on empty and then caught up with itself a minute or so later.

[SAVAGEFOX]

I would say it’s normal as mine does the same as did my single R that I had for 2 years

[JTL]

Next time I fill up I'll wait a few minutes with it on the side stand and see when the gauge reacts.  If it is time based, then that was just coincidence that it reacted when I pulled the bike upright.

[PaulS1000XR]

As I ride away with a full tank it normally takes about a minute from starting the engine to show full. 

[SAVAGEFOX]

For me takes about 5 seconds