The Yamaha RD125 is a motorcycle made in 1973 and features a two-stroke, parallel twin engine with a capacity of 124 cc. Its cooling system is air cooled, and it has an ignition system consisting of a battery coil. The starting process is kick-starting, and it has a power output of 17 hp at 8500 rpm and a maximum torque of 1.3 kgf-m at 8000 rpm. The transmission is a five-speed model with a chain final drive, and the gear ratios range from 34.52 to 9.11. The frame is a steel tube with the engine used as a stressed member. It has front suspension consisting of 28 mm telescopic forks and rear suspension with dual rear shock pre-load adjustability. The front and rear brakes are drum models with sizes of 150 mm and 130 mm, respectively. The bike’s front and rear wheels have tire sizes of 2.75-18 and 3.00-18, and the wheelbase measures 1245 mm with a seat height of 749 mm. The bike weighs 115 kg with a fuel capacity of 11.5 liters, and its top speed is 81 mph, with a standing 1/4 mile time of 18.2 seconds.
Technical specifications:
Make Model: Yamaha RD 125
| Year | 1973 |
|---|---|
| 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 | 150 mm Drum |
| 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 |
| Standing 1/4 Mile | 18.2 sec |
| Top Speed | 81 mph |
