The Janus is Yamaha Vietnam’s entry scooter and the closest thing the Vision has to a direct rival: same 97 kg weight class, same city-first mission, undercutting most competitors on price - Yamaha lists the Janus from 29,151,000 VND (manufacturer’s suggested retail, retrieved 23 September 2026). All figures below come from Yamaha Vietnam’s official Janus product page.
Engine and performance
A Blue Core 124.9 cc single-cylinder four-stroke engine with automatic CVT and a Stop & Start system. Official figures: maximum power 7.0 kW at 8,000 rpm, maximum torque 9.6 Nm at 5,500 rpm, and published fuel consumption of 1.98 litres/100 km from a 4.2-litre tank. For class context, see our scooter fuel economy comparison and our 110cc vs 125cc explainer.
Size and handling
Kerb weight 97 kg - tied with the Vision as the lightest in our comparison group and covered in our guide to light motorbikes for new riders. Seat height 770 mm, dimensions 1,850 x 705 x 1,120 mm, wheelbase 1,260 mm, ground clearance 135 mm. Yamaha fits tubeless tyres (80/80-14 front, 100/70-14 rear - narrower rubber explained in our scooter tyre sizes guide), a hydraulic front disc with rear drum brake, and a 15.3-litre underseat bay plus a USB charging port on current versions. Warranty is listed at 3 years or 30,000 km.
Who it suits
Budget-conscious commuters, students and new riders who want a 125-class engine at close to 110-class pricing. Its limit is storage and top-end comfort - for a bigger bay and more touring ability, see our Janus vs FreeGo comparison.
Renting one
The Janus is not among Nguyen Tu’s price-published models - contact us to confirm current availability. Whatever you ride, check the basics with our motorbike safety checklist before leaving the shop, and remember licence requirements follow engine capacity (our licence guides have current rules).