The full fuel range of gasoline-powered gas mini bikes is affected by a combination of multiple factors, but industry test data show that basic parameters can provide accurate references. Mainstream models usually come with metal fuel tanks with capacities ranging from 2.1 to 5.5 liters. The Honda Grom series has a measured capacity of 4.5 liters, while the Suzuki VanVan is equipped with a 6.2-liter tank, which is currently the high-end configuration. According to the SAE J1349 standard bench test, for 40cc to 125cc engines under a constant 55km/h condition, the median fuel consumption per 100 kilometers is 1.9 liters, meaning that the theoretical range with a standard 4-liter fuel tank is approximately 210 kilometers. The 2024 test report of the Japan Motorcycle Association on 10 popular models shows that the actual road fuel consumption fluctuation rate is ±15%, mainly due to differences in driving habits.
The significant difference in thermal efficiency of the power system significantly affects fuel economy. Models equipped with Electronic fuel injection (EFI) technology are 18.7% more energy-efficient than traditional carburetor versions. For instance, the closed-loop electronic fuel injection system of the Kawasaki Z125PRO compressed fuel consumption to 1.65L/100km in the EU WMTC cycle test, enabling a 3.8-liter fuel tank to achieve a range of 230 kilometers. The actual measurement data of the United States Environmental Protection Agency (EPA) shows that for every 10℃ drop in temperature, the fuel consumption of carburetor vehicles increases by 12%. The reason is that the low temperature causes the air-fuel mixture ratio concentration to deviate from the ideal value of 14.7:1. Alaska user community reports show that the driving range in sub-zero conditions has decreased by up to 35% compared to the manufacturer’s claimed value.
The quantitative influence of load and terrain on endurance is statistically significant. When a rider weighing 65 kilograms is cruising at a speed of 50 kilometers per hour on a flat asphalt road, the average fuel consumption per 100 kilometers is 1.75 liters. When the load increased to 130 kilograms or entered the sandy area, the ECU data record showed that the fuel injection pulse width increased by 28%, and the fuel consumption jumped to 2.4L/100km. Monitoring data from the Moroccan Desert Rally shows that the 150cc gas mini bike participating in the race had an average fuel consumption of 3.1L/100km on the dune sections, which was only 55% of the range on paved roads. The slope variable is equally crucial. Under an 8% continuous climbing condition, the engine load rate exceeds 90%, and fuel consumption increases by 41% compared to flat roads.
The energy efficiency optimization solution can increase the battery life by more than 15%. The 10W-30 fully synthetic engine oil certified by JASO T903 standard can reduce the internal friction loss of the engine by 7%. The MCE Insurance test in the UK has proved that this measure reduces fuel consumption by 5.3%. Tire parameter optimization brings marginal gains: when the tire pressure rises from 25psi to 32psi, the rolling resistance coefficient drops by 0.008, which is equivalent to saving 0.15 liters of fuel per 100 kilometers. A 2023 study by the Department of Mechanical Engineering at the University of Michigan indicated that installing a deflector reduces the drag coefficient by 12% and increases the driving range by 8.7% at a speed of 60km/h. A business case of comprehensive fuel economy transformation shows that after system adjustment, the operating costs of the rental fleet have been reduced by 21%, and the operation time for a single refueling has been extended by 32 hours.