Yamaha DT125 (1982)

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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

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