The Yamaha DT 125 was a popular motorcycle in 1977. It had a two stroke, single cylinder, reed-valve engine with a capacity of 123 cc / 7.5 cu-in and a bore x stroke of 56 50 mm. The bike was air cooled with a compression ratio of 7.2:1 and an autolube lubrication system. The induction was a single 24 mm Mikuni carburettor and the ignition was a magneto. The bike had a kick start and a maximum power of 13 hp / 9.5 kW @ 7000 rpm with a maximum torque of 9.8 lb-ft @ 6,500 rpm. It also had a 6 speed transmission and a chain final drive.
The Yamaha DT 125 had telescopic forks for its front suspension and a Monocross rear suspension. It had drum brakes for both the front and rear wheels and its tires measured 2.75-21 in the front and 3.50-18 in the rear. The bike was 2095 mm / 82.5 in in length, 866 mm / 34.1 in in width, and 1120 mm / 44.1 in in height with a wheelbase of 1404 mm / 53.1 in. The seat height was 810 mm / 31.8 in and the ground clearance was 265 mm / 10.4 in. The bike weighed 96 kg / 212 lbs and had a fuel capacity of 6.8 Litres / 1.8 gal.
Technical specifications:
Make Model: Yamaha DT 125
| Year | 1977 |
|---|---|
| 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 |
