The Yamaha RD 125, manufactured in 1977, has a two-stroke parallel twin engine with a capacity of 124cc/7.6 cu-in. It has a cooling system of air cooled and a compression ratio of 6.8:1. The induction of the motorcycle features 2x 18mm Teikei carburetors and ignition of battery coil. The motorcycle has a kick starting mechanism with a maximum power of 17 hp/12.4 kW at 8500 rpm and maximum torque of 1.3 kgf-m at 8000 rpm. It has a 5-speed transmission with final drive as a chain gear ratio of (1) 34.52 (2) 19.67 (3) 14.11 (4) 11.34 (5) 9.11.
The Yamaha RD 125 has a steel tube frame with front suspension featuring 28 mm telescopic forks and rear suspension consisting of dual rear shock pre-load adjustable. The motorcycle has front brakes of single 240mm disc and rear brakes of 130mm drum. The front and rear tyres of the motorcycle are 2.75-18 and 3.00-18 respectively. The wheelbase is 1245 mm/49.0 in and seat height is 749mm/29.5 inches. The wet weight of the motorcycle is 115kg/255lbs with a fuel capacity of 11.5 litres/3.04 US gallons.
Technical specifications:
Make Model: Yamaha RD 125
| Year | 1977 |
|---|---|
| Engine | Two stroke, parallel twin |
| Capacity | 124 cc / 7.6 cu-in |
| Bore x Stroke | 43 43 mm |
| Cooling System | Air cooled |
| Compression Ratio | 6.8:1 |
| Induction | 2x 18mm Teikei carburetors |
| Ignition | Battery coil |
| Starting | Kick |
| Max Power | 17 hp / 12.4 kW @ 8500 rpm |
| Max Torque | 1.3 kgf-m @ 8000 rpm |
| Transmission | 5 Speed |
| Final Drive | Chain |
| Gear Ratio | (1) 34.52 (2) 19.67 (3) 14.11 (4) 11.34 (5) 9.11 |
| Frame | steel tube engine used as a stressed member |
| Front Suspension | 28 mm telescopic forks |
| Rear Suspension | Dual rear shock pre-load adjustable |
| Front Brakes | Single240mm disc |
| Rear Brakes | 130 mm Drum |
| Front Tyre | 2.75-18 |
| Rear Tyre | 3.00-18 |
| Wheelbase | 1245 mm / 49.0 in |
| Seat Height | 749 mm / 29.5 in |
| Wet Weight | 115 kg / 255 lbs |
| Fuel Capacity | 11.5 Litres / 3.04 US gal |
