The Super Cub and the Sirius are the two most famous names in Vietnamese motorcycling - one for being the world’s best-selling design, the other for being everywhere in Vietnam at the lowest possible price. Honda and Yamaha publish full specifications for the current versions (retrieved 23 September 2026).
The core difference
The Sirius RC 110 is a 110.3 cc air-cooled semi-automatic with a four-speed rotary gearbox, at 21,993,000 VND for the alloy-wheel RC version. The Super Cub C125 is a 123.9 cc air-cooled heritage machine with a four-speed gearbox, at 88,353,813 VND. The price gap is the story: the Cub costs four times as much and does not go four times as fast.
The verified numbers
| Spec | Sirius RC 110 | Super Cub C125 |
|---|---|---|
| Engine | 110.3 cc, SOHC, air-cooled | 123.9 cc, air-cooled |
| Max power | 5.9 kW @ 8,000 rpm | 6.87 kW @ 7,500 rpm |
| Max torque | 9.0 Nm @ 5,000 rpm | 10.15 Nm @ 5,000 rpm |
| Fuel tank | 4.2 L | 3.7 L |
| Claimed economy | 2.08 L/100 km | 1.55 L/100 km |
| Kerb weight | 100 kg wet | 109 kg |
| List price | 21,993,000 VND (RC) | 88,353,813 VND |
Real-world fuel economy varies with speed, load and conditions. Neither manufacturer publishes the seat height for these models on the retrieved pages.
What it means on the road
As transport the Sirius is unbeatable: cheapest to buy, simple to fix, 4.2-litre tank, and the RC version adds a front hydraulic disc over the drum version. The Super Cub counters with genuinely better engineering numbers - more power, more torque at the same 5,000 rpm, and a claimed 1.55 L/100 km that is one of the best figures in the verified range.
But nobody buys a Super Cub for the spec sheet. They buy the silhouette, the finish and the history. That is a legitimate reason - just be clear it is styling, not speed, that the extra 66 million dong buys.
Which one for you?
If a motorbike is a tool, buy the Sirius and bank the difference. If the bike is partly a statement and you keep it for years, the Super Cub is the only underbone in Vietnam that looks like its own poster.
Renting either one
The Yamaha Sirius is one of our price-published rental classes at 150,000 VND per day - contact us to confirm current availability of the exact version. The Super Cub is not price-published: contact us to confirm current availability. Insurance is not included in rentals.