Few motorcycles carry the cultural weight of the Honda Super Cub. With over 100 million units produced globally since 1958, as documented by Honda Global Corporate, it is the most produced motor vehicle in human history.
However, the 2020 Honda C125 Super Cub isn’t a budget workhorse for haulage. It is a premium, retro-modern reinterpretation aimed at city commuters and enthusiasts alike.
During a 4-day road test through the dense, stop-and-go grid of Tokyo, Japan, I evaluated the C125 from the perspective of an urban rider—comparing its real-world performance against the everyday commuting demands of markets like Singapore and Southeast Asia.
Technical Specifications Overview
Before diving into real-world handling, here is how the 2020 Super Cub C125 stacks up on paper against factory specifications published by Honda Newsroom:
| Specification | Metric / Detail |
| Engine Type | 124.9cc air-cooled 4-stroke SOHC single-cylinder |
| Bore x Stroke / Compression | 52.4 mm × 57.9 mm |
| Peak Horsepower | 9.2 hp (6.7 kW) @ 7,500 rpm |
| Peak Torque | 11.0 Nm (8.1 lb-ft) @ 5,000 rpm |
| Fuel System | PGM-FI electronic fuel injection |
| Transmission | 4-speed semi-automatic with centrifugal clutch |
| Curb Weight (Wet) | 109 kg (240 lbs) |
| Fuel Tank Capacity | 3.7 Liters (0.98 US gal) |
| Brakes (Front / Rear) | 220mm hydraulic single disc with 1-channel ABS / 110mm drum |
| Wheel / Tire Sizes | Front: 70/90-17 |
1. Drivetrain & Powertrain Dynamics
The C125 is powered by an air-cooled, two-valve 124.9cc SOHC engine derived from Honda’s proven wave-series architecture. Paired with Honda’s Programmed Fuel Injection (PGM-FI), the motor pushes 9.2 horsepower and 11 Nm of torque.
[ Engine Output: 9.2 hp ] ──> [ Centrifugal Clutch ] ──> [ 4-Speed Gearbox ] ──> [ Final Chain Drive ]
Gearbox & Centrifugal Clutch Behavior
Unlike a standard manual motorcycle, there is no clutch lever on the left handlebar. Gear changes rely on a 4-speed semi-automatic transmission with a dual-centrifugal clutch setup:
- Stopping in gear won’t stall the engine.
- Depressing the heel-toe shift pedal disengages the clutch while selecting the next gear ratio.
- Releasing the pedal smoothly re-engages the power to the rear wheel.
Low-End Torque Curve
The engine produces almost all of its torque down low in the rev range. Because power delivery is immediate off idle, the lack of a tachometer on the dashboard is negligible—you ride entirely by engine note and throttle response rather than chasing redline numbers.
2. Real-World Road Test & Performance Limits
Riding through Tokyo’s urban arterial roads revealed both the strengths and physical boundaries of this 125cc powerplant.
- Acceleration & Top Speed: Off the line, torque is punchy enough to lead traffic across intersections up to 50 km/h. However, top speed tops out at ~90 km/h, and building momentum above 75 km/h requires patience and flat roads.
- Incline & Hill Climbing: On steep urban gradients, the 125cc single struggles to maintain highway speeds in 4th gear, requiring a downshift to 2nd or 1st gear to climb at lower speeds.
- Handling & Lane-Splitting: Weighing just 109 kg wet with narrow 17-inch tires, the C125 is exceptionally agile. Flicking through tight traffic lanes and negotiating narrow alleyways is effortless.
- Suspension Limits: The 26mm telescopic front fork and twin rear shocks are tuned for smooth city pavement. While ideal for well-maintained roads in Singapore or Tokyo, hitting sharp potholes or mounting curbs will quickly bottom out the suspension travel.
3. Real-World Fuel Economy & Operational Range
Fuel efficiency is where the C125 excels over almost any other gas-powered commuter on the road.
Field Test Consumption: During my 4-day city riding trial in Tokyo, the calculated fuel consumption averaged 63 km/L (148 mpg) in purely urban, stop-and-go conditions.
Estimated Operational Range
With a 3.7-liter fuel tank, a full fill-up provides a usable range of ~230 km to 233 km before running dry. While the absolute tank capacity is modest, refueling costs remain minimal for daily riders.
4. Ergonomics & Rider Fitment (180 cm / 75 kg Test)
Ergonomics are heavily tailored toward traditional Asian commuter proportions (statistically averaging ~170 cm for men and ~158 cm for women). Here is how it feels for a taller rider:
- Cockpit & Handlebars: At 180 cm tall and 75 kg, the handlebars feel noticeably low and pulled back. While legroom around the leg shields is surprisingly adequate without forcing a hunched spine, larger riders may feel slightly cramped during sharp, full-lock turns.
- Heel-Toe Shifter Boot Interference: Shifting up using the toe pedal is seamless, but downshifting or stepping down on the heel lever while wearing thick riding boots requires angling your foot outward—the heel pad is positioned close to the side bodywork.
- Seat Comfort & Weather Protection: The high-density urethane seat is soft and supportive for short-to-medium commutes, though its narrow width can feel restrictive for heavier riders. The iconic leg shields deflect cold wind away from your legs, though they offer minimal protection against heavy rain.
5. Cockpit Technology, Smart Key UI & Braking Safety
The 2020 model bridges classic aesthetics with modern convenience items:
[ Proximity Smart Key ] ──> [ Push Main Dial ] ──> [ Blue LED Glows ] ──> [ Turn Dial to 'ON' ] ──> [ Press Starter Button ]
- Honda Smart Key System: Keeping the key fob in your pocket unlocks ignition, steering lock, and the electric seat latch. When walking away, the bike emits an audible beep and flashes its turn signals to confirm the immobilizer is active.
- Left-Handed Ergonomic Note: The ignition dial is mounted low on the right side of the inner fairing—a slightly awkward reach for left-handed riders accustomed to central key barrels.
- Dashboard Instrument Cluster: Features an analog speedometer ring surrounding an inverted LCD display showing fuel level, clock, gear position indicator, and dual trip meters.
- Braking Dynamics: Stopping power comes from a single 220mm front disc with single-channel ABS and a traditional 110mm rear drum. Thanks to the light 109 kg wet weight, the bike stops predictably from city speeds up to 70 km/h.
6. Market Positioning & Competitor Comparison
In regions like Singapore, the C125 falls under the entry-level Class 2B motorcycle license category (up to 200cc). However, its price point positions it as a premium lifestyle choice rather than a budget utility vehicle.
| Model | Classification / Engine | Key Focus | Price Tier |
| Honda Super Cub C125 | 124.9cc Semi-Auto | Retro Style, Smart Key, Premium Finish | Premium |
| Honda Wave Alpha / 125i | 109cc – 124.9cc Semi-Auto | Pure Utility, Fleet Work, Low Maintenance | Budget / Commercial |
| Yamaha Y15ZR / T150 | 150cc Manual | Sport Performance, Liquid Cooling, Speed | Mid-Range Sport |
| Honda CT125 Hunter Cub | 124.9cc Semi-Auto | Off-Road Utility, Scrambler Style, High Intake | Premium Adventure |
Final Verdict: Who Should Buy the C125 Super Cub?
The 2020 Honda C125 Super Cub is not trying to be a high-speed highway cruiser or a cheap delivery bike. It is a modern tribute to an engineering icon, built with high fit-and-finish standards, cast alloy tubeless wheels, full LED lighting, and smart-key technology.
Recommended For:
- Retro Enthusiasts & Collector Riders: Riders seeking classic 1950s aesthetic lines combined with modern fuel injection, ABS, and reliability.
- Urban Commuters: City riders prioritizing 60+ km/L fuel efficiency, light weight, and effortless lane agility over top-end highway speed.
Not Recommended For:
- Commercial Delivery Couriers: Budget-conscious workers will find better value-for-money in utility platforms like the Honda Wave series.
- Highway & Long-Distance Riders: Riders requiring sustained speeds above 90 km/h or pillion-heavy mountain climbing.
For a full visual walkthrough of the dashboard, keyless operation, and exhaust sound, watch my detailed field test video below:
- Watch the full review video: 2020 Honda C125 Super Cub Review | A Timeless Ride (YouTube)