The 1978 Yamaha DT 125 is a two-stroke, single cylinder, reed-valve motorcycle with an engine capacity of 123cc. It has a 56.50mm bore and stroke with a compression ratio of 7.2:1. The bike is air-cooled with an autolube lubrication system using 1.2 liters of oil. The motorcycle utilizes a single 24mm Mikuni carburetor for induction and magneto ignition for starting. The DT 125 has a maximum power output of 13 horsepower at 7000 rpm and 9.8 lb-ft of torque at 6500 rpm.
The transmission is six-speed, and the final drive is a chain. The front suspension utilizes telescopic forks while the rear suspension is monocross. The bike has drum brakes on both the front and rear, and it comes with a 2.75-21 front tire and a 3.50-18 rear tire.
The Yamaha DT 125 has a length of 2095mm, a width of 866mm, and a height of 1120mm. The wheelbase measures 1404mm, and the seat height is 810mm with a ground clearance of 265mm. The dry weight of the motorcycle is 96kg, and the fuel capacity is 6.8 liters.
Overall, the Yamaha DT 125 is a relatively lightweight motorcycle with a simple design and a reliable engine, ideal for both on and off-road adventures. It remains a popular choice amongst vintage motorcycle enthusiasts.
Technical specifications:
Make Model: Yamaha DT 125
| Year | 1978 |
|---|---|
| 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 | 1.2 Litres / 1.76 qts |
| Induction | Single 24 mm Mikuni carburettor |
| Ignition | Magneto |
| Starting | Kick |
| Max Power | 13 hp / 9.5 kW @ 7000 rpm |
| Max Torque | 9.8 lb-ft @ 6,500 rpm |
| Transmission | 6 Speed |
| Final Drive | Chain |
| Front Suspension | Telescopic forks |
| Rear Suspension | Monocross |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| Front Tyre | 2.75-21 |
| Rear Tyre | 3.50-18 |
| Dimensions | Length 2095 mm / 82.5 in Width 866 mm / 34.1 in Height 1120 mm / 44.1 in |
| Wheelbase | 1404 mm / 53.1 in |
| Seat Height | 810 mm / 31.8 in |
| Ground Clearance | 265 mm / 10.4 in |
| Dry Weight | 96 kg / 212 lbs |
| Fuel Capacity | 6.8 Litres / 1.8 gal |
