The Yamaha DT125MX was a two-stroke, single-cylinder, reed-valve motorcycle with a 123cc capacity and a compression ratio of 7.2:1. It had a max power of 14hp at 6500rpm and a torque of 1.5kgf-m at 6500rpm. The bike had a six-speed transmission and a chain final drive. The suspension featured telescopic forks at the front and a monocross at the rear, with drum brakes both front and back. The bike weighed 96kg and had a fuel capacity of 7 litres, with an average fuel consumption of 79mpg. The standing quarter-mile time was 19.9 seconds and it had a top speed of 74mph. The Yamaha DT125MX was 2080mm long, 885mm wide, and 1120mm high, with a wheelbase of 1325mm and a seat height of 855mm. The ground clearance was 265mm, and the front tyre was 2.75-21, while the rear was 3.50-18.
Technical specifications:
Make Model: Yamaha DT 125MX
| Year | 1982 |
|---|---|
| Engine | Two stroke, single cylinder, reed-valve |
| Capacity | 123 cc / 7.5 cu-in |
| Bore x Stroke | 56 50 mm |
| Cooling System | Air cooled |
| Compression Ratio | 7.2:1 |
| Lubrication | Autolube |
| Oil Capacity | 0.9 Litres |
| Induction | Single 24 mm Mikuni |
| Ignition | Flywheel Magneto |
| Starting | Kick |
| Max Power | 14 hp / 10.3 kW @ 6500 rpm |
| Max Torque | 1.5 kgf-m / 15.2 Nm @ 6500 rpm |
| Clutch | Wet multiplate |
| Transmission | 6 speed |
| Final Drive | Chain |
| Front Suspension | Telescopic Forks |
| Front Wheel Travel | 160 mm / 6.2 in |
| Rear Suspension | Monocross |
| Rear Wheel Travel | 115 mm / 4.5 in |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| Front Tyre | 2.75-21 |
| Rear Tyre | 3.50-18 |
| Dimensions | Length 2080 mm / 81.8 in Width 885 mm / 34.8 in Height 1120 mm / 41.0 in |
| Wheelbase | 1325 mm / 52.2 in |
| Seat Height | 855 mm / 33.6 in |
| Ground Clearance | 265 mm / 10.4 in |
| Dry Weight | 96 kg / 212 lbs |
| Fuel Capacity | 7 Litres / 1.58 gal |
| Consumption Average | 79 mpg |
| Standing 1/4 Mile | 19.9 sec |
| Top Speed | 74 mph |
