Yamaha DT 125 (1978-79)

The Yamaha DT 125E, produced from 1978-79, is a two-stroke, single cylinder, reed-valve engine with a capacity of 123cc. It has a compression ratio of 7.1:1 and uses Autolube for its lubrication, with an oil capacity of 1.2 litres. The induction system consists of a single 24mm Mikuni carburetor and the ignition is powered by a 12V, 7AH battery with a flywheel magneto charging system. Starting options include both electric and kick. The motorcycle can generate a maximum power of 13 hp and maximum torque of 1.4 kgf-m. The clutch is wet multiplate, and it has a six-speed transmission with a chain final drive. The front suspension is a telescopic fork with 160mm wheel travel, while the rear suspension is a monocross system with 115mm wheel travel. The brakes are drum, and it has front and rear tires of 2.75-21 and 3.25-18 respectively. It measures 2030mm in length, 860mm in width, and 1090mm in height, with a wheelbase of 1325mm and ground clearance of 250mm. The dry weight is 104.5kg, and it has a fuel capacity of 7.0 litres.

---

Technical specifications:

Make Model: Yamaha DT 125E

Year: 1978-79

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: 7.1:1

Lubrication: Autolube

Oil Capacity: 1.2 Litres / 1.76 qts

Induction: Single 24 mm Mikuni

Ignition: Battery, CB/Coil

Battery: 12 V, 7 AH

Charging: Flywheel magneto

Starting: Electric & kick

Max Power: 13 hp / 9.5 kW @ 7000 rpm

Max Torque: 1.4 kgf-m / 13.9 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: 3.25-18

Dimensions: Length 2030 mm / 79.8 in Width 860 mm / 33.8 in Height 1090 mm / 42.9 in

Wheelbase: 1325 mm / 52.2 in

Ground Clearance: 250 mm / 9.8 in

Seat Height: 820 mm / 32.2 in

Dry Weight: 104.5 kg / 230.3 in

Fuel Capacity: 7.0 Litres / 1.58 gal