The mileage on my Scout stays within a 4 mile a gallon range almost all of the time. The trip OD shows me a more accurate picture of the gas remaining in the tank than a gauge probably would. The only real variance is when the winter formulation gas hits the pumps, then my mileage drops a couple of miles a gallon until spring/summer.
You may be interested to know that my brother is currently using the LSK electronics gauge on his Suzuki LS650 bobber. That is a gravity fed/petcock fuel tank into a carburettor system, so apparently perfect for the installation of the LSK unit, but, it has been a little erratic in use and he has had to play with the orientation of the sensor box in order to get it to read reliably. Not sure how happy he is with the final result.
The problem with the scout tank is that it does appear to "pressurise", particularly if the tank vents pass through a charcoal filter box to comply with Californian emission regulations.
Read some of the forum entries about funny noises coming from the fuel tank when the scout is stationary.
Personally I have never experienced this "noise" problem but the UK models are not fitted with the charcoal emission control equipment and the vents from the tank just exit at the bottom of the swing arm. I'm pretty sure that even if you did drill and tap a fuel tank hole in the scout the LSK unit would probably not perform like an oem fuel gauge.
For what it’s worth, I had a 2018 Springfield before trading up to my Chieftain... the Springfield had a what I believe to be a gravity type fuel gauge and it was horribly inaccurate and most of the time useless... I too had to rely on remembering to reset one of my trips at every fill up, sometimes I’d forget and it’d be a little game of “am i gonna make it??”
It’s kinda ridiculous in my opinion, $18k motorcycle in the Springfield and we get a garbage fuel gauge haha.
My Chieftains got a digital fuel gauge which seems to be MOSTLY ok. Every now and then I fill up and it doesn’t reach that last block to being full.
I haven't installed one, but I've been considering it. What about a fuel sight? Basically a clear tube running along your tank showing how much fuel is in it. Seems more like a custom chopper thing but it could be the solution for us Scout owners.