Specification sheet — Yamaha
Yamaha Aerox Alpha specifications
The Aerox Alpha is the current sporty 155 cc scooter, with a 790 mm seat and a 5.5 L tank.
- Displacement
- 155.1 cc
- Peak power
- 11.3 kW (15.4 PS) / 8,000 rpm
- Peak torque
- 14.2 N·m / 6,500 rpm
- Curb weight
- 130 kg (TURBO & TURBO Ultimate), 127 kg (CyberCity), 124 kg (Standard)
- Seat height
- 790 mm
- Fuel tank
- 5.5 L
Overview
The published sheet lists a 155.09 cc engine, peak power of 11.3 kW (15.4 PS) / 8,000 rpm, peak torque of 14.2 N·m / 6,500 rpm. It carries a curb weight of 130 kg (TURBO & TURBO Ultimate), 127 kg (CyberCity), 124 kg (Standard), a 790 mm seat height and a 5.5 L tank.
On the published figures it works out to 8.7 kW per 100 kg, level with the median for the other 5 scooters in this database (9 kW per 100 kg).
Market and trim notes
This sheet covers the Yamaha Aerox Alpha as listed in the Indonesian distributor’s current catalogue. Market-specific equipment can differ from the same nameplate in another country, so the figures are not interchangeable.
Full specification
Every row below is a published figure. Rows the manufacturer does not publish are marked rather than estimated.
Engine and performance
| Engine type | 4 Langkah, berpendingin cairan, SOHC 4 katup, VVA |
|---|---|
| Displacement | 155.09 cc |
| Bore × stroke | 58 x 58.7 mm |
| Compression ratio | 11.6 : 1 |
| Cooling | Liquid derived |
| Fuel system | Fuel Injection |
| Maximum power | 11.3 kW (15.4 PS) / 8,000 rpm |
| Maximum torque | 14.2 N·m / 6,500 rpm |
| Starting | Electric Starter |
| Ignition | TCI |
| Lubrication | Pelumasan Basah |
| Oil capacity | 1.0 L (TURBO & TURBO Ultimate), 0.9 L (Standard & CyberCity) |
Transmission and final drive
| Transmission | V-Belt Otomatis / YECVT (TURBO & TURBO Ultimate) |
|---|---|
| Clutch | Kopling sentrifugal, Kering |
| Final drive | V-belt derived |
Chassis, suspension and brakes
| Frame | Backbone |
|---|---|
| Front suspension | Telescopic with 30 mm Inner Tubes |
| Rear suspension | Unit Swing |
| Front brake | Disc Brake |
| Rear brake | Disc Brake |
| Front tyre | 110/80-14/C 53P |
| Rear tyre | 140/70-14/C 62P |
Dimensions, weight and capacity
| Length × width × height | 1980 x 710 x 1170 mm |
|---|---|
| Wheelbase | 1350 mm |
| Ground clearance | 145 mm |
| Seat height | 790 mm |
| Curb weight | 130 kg (TURBO & TURBO Ultimate), 127 kg (CyberCity), 124 kg (Standard) |
| Fuel tank | 5.5 L |
What the numbers mean
The 790 mm seat is a middle-of-the-road height: most riders will get the balls of both feet down.
At 130 kg (TURBO & TURBO Ultimate), 127 kg (CyberCity), 124 kg (Standard) it is manageable at walking pace but heavy enough to notice on a slope.
The 5.5 L tank is typical for the class and enough for a week of commuting between fills. The manufacturer does not publish a consumption figure, so this page does not quote a range.
Tyres are 110/80-14/C 53P front and 140/70-14/C 62P rear. Check that your local shop stocks both before a long trip.
Closest alternatives
| Model | Capacity | Power | Torque | Weight | Seat |
|---|---|---|---|---|---|
| Yamaha NMAX 155 | 155.1 cc | 11.3 kW / 8,000 rpm | 13.9 N·m / 6,500 rpm | 130 kg (Standard & Connected Version), 132 kg (Connected/ABS Version) | 765 mm |
| Yamaha NMAX Turbo | 155.1 cc | 11.3 kW / 8,000 rpm | 14.2 N·m / 6,500 rpm | 135 kg | 770 mm |
| Yamaha Lexi LX 155 | 155.1 cc | 11.3 kW / 8,000 rpm | 14.2 N·m / 6,500 rpm | Standard: 116 kg ; S Version: 117 kg ; Connected/ABS: 118 kg | 770 mm |
Nearest alternatives by category and capacity in this database. These are published figures, not a road test or a recommendation.
Ownership and maintenance notes
- The V-belt and rollers are the parts that change the feel of a CVT scooter. Inspect them at the interval in the owner's manual, and sooner if acceleration flattens or the engine revs without matching speed.
- Engine oil and the air filter do most of the work in keeping a small scooter consistent. Check the oil level cold, on level ground, and use the grade listed for the model.
- Liquid cooling adds a coolant level and condition check. Do it when the engine is cold, and never open the radiator cap on a hot engine.
Source and verification
Figures are taken from Yamaha Motor Indonesia, the Indonesian distributor, on 13 November 2026.
Source page: yamaha-motor.co.id/product/aerox-alpha/.
Cooling, final drive is inferred from the published layout rather than printed as a separate field.
Wording is quoted as published; spacing and unit symbols are normalised. Specification databases go stale: if a figure here differs from the current distributor page, the distributor page wins, and this sheet records what was published on the verification date.
