For motorcycles people often just use the trip odometer to estimate fuel used. Interestingly, this is similar to coulomb counting which is one of the more commo

For motorcycles people often just use the trip odometer to estimate fuel used. Interestingly, this is similar to coulomb counting which is one of the more common methods of state of charge tracking. Technically coulomb counting would be more analogous to measuring the amount of fuel being pumped out of the tank.