Most gas pumps in this area have a rubber sheathed springy jacket around the actual gas filler nozzle. The purpose of this is to suck up the gas *fumes* while you’re filling. This means that there’s less chance of an explosion and also helps in reducing air pollution. That’s all well and good but…
It’s set up so that the gas won’t pump when you pull the lever unless the filler nozzle is pushed all the way into the gas tank, thus compressing the springy sheath which surrounds the filler nozzle.
This works fine on a car (which has a long filler neck), but not on some bikes as they may have an obstruction in the tank (e.g. around a frame tube) which prevents you being able to push the nozzle all the way into the tank. Even if you can push the nozzle all the way into the tank, it means that you’ll only be able to half fill it before the blow-back cut-off kicks-in (i.e. when the level of fuel in the tank reaches the gas pump nozzle, falsely indicating to the pump that your tank’s full).
For such pumps, you have to hold the fingers of your left hand in a V-sign (sport biker’s wave) while holding the pump hose trigger with your right.
With your left hand V-sign (one finger on each side of the filler nozzle), you pull the sheath back (thus over-riding the sheath cut-off switch) so that it’ll pump gas. In doing this, *you* can decide how far you want to push the filler nozzle into the gas tank filler neck.
I know this sounds awkward, but it’s not difficult and you’ll have to learn to do it if you want to fill your gas tank using these types of pumps.