Yamaha rd125

Yamaha RD125 (1973-1982)

SpecificationsRD125 (1973-1982)
EngineAir-cooled 2-stroke single
Displacement123 cc (7.51 cu in)
Bore and stroke54 mm (2.13 in) x 54 mm (2.13 in)
Compression ratio7.5:1
Power10 hp (7.5 kW) at 8,500 rpm
Torque7.8 lb⋅ft (10.6 N⋅m) at 7,000 rpm
CarburetionMikuni VM22
ClutchWet multi-plate
Final driveChain
FrameSingle backbone
SuspensionFront: Telescopic fork, 35 mm (1.4 in) travel
Rear: Twin shocks, 80 mm (3.1 in) travel
BrakesFront: Drum
Rear: Drum
WheelsFront: 14 inches
Rear: 14 inches
TiresFront: 2.75-14
Rear: 3.00-14
Seat height30.3 inches (770 mm)
Wheelbase54.3 inches (1,380 mm)
Rake and trail26° / 3.9 inches (99 mm)
Dry weight242 lb (109 kg)
Fuel capacity2.6 US gal (9.8 L)
Oil capacity3.0 US qt (2.8 L)
Gear ratios1st: 2.38
2nd: 1.66
3rd: 1.25
4th: 1.00
5th: 0.86
0-60 mph10.5 seconds
Top speed80 mph (129 km/h)
Fuel economy55 mpg (23 kmpl)
Oil Details
| Type | SAE 30 |
| Capacity | 3.0 US qt (2.8 L) |

Yamaha RD125 motorcycle

The RD125 was a more powerful version of the RD50. It was powered by a 125cc air-cooled engine that produced 10 horsepower. The RD125 was a popular choice for teenagers and young adults. It was a fun and fast bike, but it was also not very comfortable to ride for long periods of time.


More powerful than the RD50
Fun and fast
Reliable and durable

Not very comfortable to ride for long periods of time
Not a good choice for beginners

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