Yamaha DT50M
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.
 A Yamaha DT50 | |
| Manufacturer | Yamaha |
|---|---|
| Production | 1978 – 1981 |
| Successor | DT50MX |
| Class | Motorcycle |
| Engine | 49 cc (3.0 cu in) 2-stroke Torque Induction single |
| Transmission | 5-speed manual, Multi-plate Wet, gear |
| Suspension | Front: Telescopic forks Rear; Twin shock swingarm |
| Brakes | Front: Drum Rear: Drum |
| Wheelbase | 1,210 mm (48 in) |
| Dimensions | L: 1,860 mm (73 in) W: 805 mm (31.7 in) H: 1,045 mm (41.1 in) |
| Seat height | 780 mm (31 in) |
| Weight | 72 kg (159 lb) (dry) 80 kg (180 lb)[1] (wet) |
| Fuel capacity | 4.7 l (1.2 US gal) |
| Oil capacity | 1.2 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.
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