A class-crossing comparison: Honda’s largest semi-automatic underbone against Yamaha’s evergreen light 110. All figures come from the official Honda Vietnam and Yamaha Vietnam product pages (retrieved 23 September 2026).
Engines
Future 125 FI: 124.9 cc, PGM-FI, 6.83 kW at 7,500 rpm, 10.2 Nm at 5,500 rpm. Sirius: 110.3 cc SOHC, 5.9 kW at 8,000 rpm, 9.0 Nm at 5,000 rpm. The Future is the stronger, torquier and more modern engine; the Sirius is the simpler, lighter proposition.
Economy and range
Future: 1.47 L/100 km from 4.6 L - the best published economy of any bike compared in this article, with over 300 km of range. Sirius: 2.08 L/100 km from 4.2 L, roughly 200 km. On a long commute the Future’s advantage compounds every week.
Weight and dimensions
Future: 104 kg, 756 mm seat, 1,931 x 711 x 1,083 mm, 1,258 mm wheelbase. Sirius: 100 kg wet, 1,890 x 665 x 1,035 mm - the narrower, shorter machine, easier in tight alleys but less settled at speed. Both use four-speed rotary gearboxes and 17-inch wheels.
Price
Future 125 FI from 30,622,909 VND; Sirius RC from 21,993,000 VND, with cheaper drum and disc versions (list prices retrieved 23 September 2026). The gap is real: about 8-9 million VND.
Verdict
Sirius for the tightest budgets and tightest lanes; Future for commuters who ride every day, carry loads or travel farther - the extra torque and range pay for themselves. See our commuting guide for how distance changes the math. Contact us to confirm current availability.