Regardless of tank size ALWAYS carry a syphon hose. I know a guy (very well) who once, on the last day of a long, tiring 7 day trip accidentally filled his tank with 5.2 gallons of diesel fuel. A fuel injected bike will travel exactly 83 yards, 16 inches on diesel fuel. Having the hose corrected his brain fart pretty quickly, although starting the bike after refueling with gas is not easy.
Battery almost went dead before the engine turned over.
This reminds of a "there I was, this is no chit story"
when i was a young LT, one of my Soldiers mistook a 5 gallon can of diesel for MOGAS ( red and yellow kind of look alike through a red lens flashlight)
filled a generator with diesel.
the young, immigarant mechanic trying to do the right thing is sucking the diesel out of the gas generator and spitting it out to drain the tank...
spewww speew cough cough ....
hack hack
silence
a few minutes later same thing
lucky he didnt kill himself...
you gotta love Soldiers