Yamaha RD125: review, history, specs

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Yamaha RD125
Also called RD125DX, RD125LC, RD 125 LC, RD 125 DX, RD 125
Production 1973 - 1983
Class Classic
twin cylinder, two-stroke
Bore / Stroke 56.0mm x 50.0mm
Compression ratio 6.8:1
Top Speed 78 mph (126 km/h)
Horsepower 16.63 HP (12.4 KW) @ 9000RPM
Spark Plug NGK B8HS '75
NGK B8ES '76
Battery YUASA 12N5-5A-3B '75 , '76
Transmission Gear box: 6-speed

Final Drive: chain

Clutch: wet plate
Final Drive Chain: 428x110
Front Sprocket 14T
Rear Sprocket 39T
Suspension Front: Telescopic forks
Rear: Dual rear shock preload adjustable
Brakes Front: single disc
Rear: expanding brake
Front Tire 2.75-18
Rear Tire 3.25-18
Wheelbase 49.02 inches (1245 mm)
Seat Height 29.49 inches (749 mm)
Weight 115.0 kg (wet)
Recommended Oil Yamalube 10w-40
Fuel Capacity 3.43 Gallon (13.00 Liters)
Related Yamaha RD200, Yamaha RD250, Yamaha RD350
Yamaha YFS200
Manuals Service Manual

Reviews ·

The Yamaha RD125 was a twin cylinder, two-stroke Classic motorcycle produced by Yamaha between 1973 and 1983. It could reach a top speed of 78 mph (126 km/h). Claimed horsepower was 16.63 HP (12.4 KW) @ 9000 RPM.

Overview[edit | edit source]

Welcome to low compression and the permanent 90 Km (55 mph) limit. The engine reaches its initial peak at 6000 rpm, then trails along a plateau until 7000 rpm.

Engine[edit | edit source]

The engine was an air cooled two cylinder, two-stroke. A 56.0mm bore x 50.0mm stroke result in a displacement of just 123.0 cubic centimeters. Fuel was supplied via a membrane.

Drive[edit | edit source]

The bike has a 6-speed transmission. Power was moderated via the wet plate.

Chassis[edit | edit source]

It came with a 2.75-18 front tire and a 3.25-18 rear tire. Stopping was achieved via single disc in the front and a expanding brake in the rear. The front suspension was a Telescopic forks while the rear was equipped with a Dual rear shock preload adjustable. The RD125LC was fitted with a 3.43 Gallon (13.00 Liters) fuel tank. The wheelbase was 49.02 inches (1245 mm) long.

The Yamaha RD125 is a motorcycle produced by Yamaha from 1975 to 1981.

1975[edit | edit source]

1973 - 1980 Yamaha RD 125[edit | edit source]

1973 - 1980 Yamaha RD 125 1973 - 1980 Yamaha RD 125 1973 - 1980 Yamaha RD 125 1973 - 1980 Yamaha RD 125

In Media[edit | edit source]

References[edit | edit source]