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Yamaha DT50M

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The Yamaha DT50M is an entry-level 50CC in the Yamaha DT50M series, produced from 1978 to 1981. It is a dual-purpose street/trail bike primarily aimed at novice motorcyclists.

Yamaha DT50M
A Yamaha DT50
ManufacturerYamaha
Production1978 – 1981
SuccessorDT50MX
ClassMotorcycle
Engine49 cc (3.0 cu in) 2-stroke Torque Induction single
Transmission5-speed manual, Multi-plate Wet, gear
SuspensionFront: Telescopic forks
Rear; Twin shock swingarm
BrakesFront: Drum
Rear: Drum
Wheelbase1,210 mm (48 in)
DimensionsL: 1,860 mm (73 in)
W: 805 mm (31.7 in)
H: 1,045 mm (41.1 in)
Seat height780 mm (31 in)
Weight72 kg (159 lb)[citation needed] (dry)
80 kg (180 lb)[1] (wet)
Fuel capacity4.7 L (1.2 US gal)
Oil capacity1.2 L (0.32 US gal)

The DT50M has twin rear shocks and 19"/17" front and rear wheels. The DT50MX, which is a later model of the DTM50M, has larger 21"/18" wheels and a mono shock rear suspension. After its production and high sales, Yamaha decided to produce a street bike variant of the DT50M, which was given the model number RD50M.

The Yamaha DT50MX was given similar treatment to the Yamaha RD50MX.

Engine and transmission

Engine type Air cooled, single cylinder, 2-stroke
Bore and Stroke 40.0 x 39.7mm
Compression ratio 5.7:1
Induction Piston port and reed valve
Lubrication System Autolube
Starting system Kick starter
Clutch Wet, multi-plate
Gearbox 5-speed, constant mesh
Carburettor Mikuni VM16SH
Battery 6V 4AH
Charging system Flywheel magneto
Ignition type Magneto

Identification (UK)

Model Frame/Engine number Production code Model year
DT50M 2M9-000101 on 2M9 1978
DT50M 2M9-100101 on 2M9 1979
DT50M 2M9-200101 on 2M9 1980

Note: The Model year is not necessarily the same as the year of sale or first registration.

References

  1. ^ "DT50M (1978)". Yamaha Community. Retrieved August 12, 2018.