Specification sheet — Yamaha
Yamaha R25 specifications
The 250 cc parallel-twin R25, with a 14 L tank and a 780 mm seat.
- Displacement
- 249.6 cc
- Peak power
- 26.4 kW/12,000 rpm
- Peak torque
- 22.5 N·m/10,000 rpm
- Curb weight
- 166 kg
- Seat height
- 780 mm
- Fuel tank
- 14 L
Overview
The published sheet lists a 249.55 cc engine, peak power of 26.4 kW/12,000 rpm, peak torque of 22.5 N·m/10,000 rpm. It carries a curb weight of 166 kg, a 780 mm seat height and a 14 L tank.
On the published figures it works out to 15.9 kW per 100 kg, below the median for the other 5 sport bikes in this database (16.3 kW per 100 kg).
Market and trim notes
This sheet covers the Yamaha R25 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 | Pendingin Cairan, 4-Langkah DOHC, 4 Valve |
|---|---|
| Displacement | 249.55 cc |
| Bore × stroke | 60.0 x 44.1 mm |
| Compression ratio | 11.6 : 1 |
| Cooling | Liquid derived |
| Fuel system | Fuel Injection |
| Maximum power | 26.4 kW/12,000 rpm |
| Maximum torque | 22.5 N·m/10,000 rpm |
| Starting | Elektrik |
| Ignition | TCI |
| Lubrication | Basah |
| Oil capacity | 2.50 L (Total); 2.00 L (Berkala); 2.30 L (Ganti Filter Oli) |
Transmission and final drive
| Transmission | Manual |
|---|---|
| Clutch | Tipe Multi-Plate Basah, Assist & Slipper Clucth |
| Gear pattern | 1-N-2-3-4-5-6 |
| Final drive | Chain derived |
Chassis, suspension and brakes
| Frame | Diamond |
|---|---|
| Front suspension | Teleskopik Fork (Inverted) |
| Rear suspension | Linkless Monoshock |
| Front brake | Cakram Hidraulic, Piston Ganda |
| Rear brake | Cakram Hidraulic, Piston Tunggal |
| Front tyre | 110/70-17M/C (54S) |
| Rear tyre | 140/70-17M/C (66S) |
Dimensions, weight and capacity
| Length × width × height | 2090 x 755 x 1075 mm |
|---|---|
| Wheelbase | 1380 mm |
| Ground clearance | 160 mm |
| Seat height | 780 mm |
| Curb weight | 166 kg |
| Fuel tank | 14 L |
What the numbers mean
The 780 mm seat is a middle-of-the-road height: most riders will get the balls of both feet down.
At 166 kg it is a two-person job to move uphill; plan parking before you stop.
The 14 L tank is touring-sized, which matters more on a bike that can sit at highway speed. The manufacturer does not publish a consumption figure, so this page does not quote a range.
Tyres are 110/70-17M/C (54S) front and 140/70-17M/C (66S) rear. Check that your local shop stocks both before a long trip.
Closest alternatives
| Model | Capacity | Power | Torque | Weight | Seat |
|---|---|---|---|---|---|
| Yamaha R15 | 155.1 cc | 14.2 kW / 10,000 rpm | 14.7 N·m / 8,500 rpm | 137 kg (All New R15), 140 kg (All New R15M) | 815 mm |
| Honda CBR250RR | 249.7 cc | 28.5 kW (38.7 PS) / 12,500 rpm (STD) 31 kW (42 PS)/13,000 rpm (SP | SP QS) | 23.3 N·m (2.4kgf.m)/11,000 rpm (STD) 25 N·m (2.5 kgf·m)/11,000 rpm (SP | SP QS) | 166 kg (STD), 168 kg (SP | SP QS) | 790 mm |
| Kawasaki Ninja ZX-25R | 249.8 cc | 35.2 kW (47 PS) / 15,500 rpm (with Ram Air) | 22.0 N·m (2.2 kgf·m) / 12,500 rpm | 180 kg | 785 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
- Clean and lubricate the chain at short intervals in rain or dust, and check slack with the bike on its side stand. A loose chain wears sprockets quickly; a tight one loads the output bearing.
- Check tyre pressures cold. On a light bike a few psi matters more than it does on a car, and it changes both steering and tyre life.
- 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.
- A high-specific-output engine rewards correct oil level and valve-clearance checks. Do not stretch the service interval because the bike feels fine.
Source and verification
Figures are taken from Yamaha Motor Indonesia, the Indonesian distributor, on 13 November 2026.
Source page: yamaha-motor.co.id/product/r25/.
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.
