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Yamaha RX 125
1984Off-road

Yamaha RX 125

Key specifications

Engine
124 cc
Power
34 HP
Fuel type
petrol
Fuel capacity
2.3 L
Transmission
6-speed
Front brakes
Expanding brake
Rear brakes
Expanding brake

Overview

Introducing the 1984 Hyosung RX 125, a remarkable specimen in the world of Enduro-offroad motorcycles that perfectly marries agility and raw power. Designed for both the novice and seasoned rider, the RX 125 quickly carved a niche for itself in a market dominated by giants. With its lightweight frame and aggressive styling, this bike exudes the spirit of adventure while being an accessible entry point for those looking to conquer trails and backroads alike. Whether you’re commuting through urban jungles or tackling rugged terrains, the RX 125 delivers a versatile ride that meets the demands of various environments. At the heart of the RX 125 lies a spirited 124cc single-cylinder, two-stroke engine that punches well above its weight. Producing an impressive 34 horsepower at a dizzying 10,750 RPM, this powerplant is tuned for exhilarating performance, making it a thrilling ride for both new and experienced riders. Its top speed of 130 km/h (80.8 mph) ensures that you won’t be left behind on the highway or the trail. With a compression ratio of 11.5:1 and a liquid cooling system, the engine maintains optimum performance even under strenuous conditions. Coupled with a 6-speed gearbox and a robust shaft drive, the RX 125 offers smooth, responsive acceleration, making it a joy to ride on any terrain. The 1984 RX 125 is not just about power; it also boasts features that enhance its off-road capabilities. The bike’s lightweight construction, weighing in at just 91 kg (200.6 lbs), ensures easy maneuverability, while the expanding brake system front and rear provides reliable stopping power when you need it most. With a fuel capacity of 8.5 liters (2.25 gallons), you can confidently tackle longer rides without the constant worry of refueling. The bike’s compact dimensions and a bore-stroke ratio of 54mm x 54mm give it a well-balanced and agile feel, allowing for sharp cornering and quick turns—essential attributes for any Enduro enthusiast. **

Pros

  • Lightweight and Agile: At just 91 kg, the RX 125 is easy to handle, making it perfect for both new riders and seasoned veterans.
  • Powerful Engine: The 34 HP output ensures thrilling acceleration and impressive top speed, ideal for both on-road and off-road adventures.
  • Versatile Performance: With a robust 6-speed gearbox and reliable shaft drive, the RX 125 is engineered for a smooth and responsive ride across various terrains.

Cons

  • Limited Fuel Capacity: The 8.5-liter tank may require frequent stops during extended rides, especially on long trails.
  • Basic Brake System: While the expanding brakes are adequate, they may not provide the same level of stopping power as more advanced disc brake systems found on modern bikes.
  • Two-Stroke Maintenance: As a two-stroke engine, it may require more frequent maintenance and attention compared to four-stroke counterparts, particularly in terms of oil mixing and cleaning.

Technical details

Source specification data

Make
Aprilia
Model
RX 125
Category
Enduro-offroad
Power
34.00 HP (24.8 kW)) @ 10750 RPM
Gearbox
6-speed
Top Speed
130.0 km/h (80.8 mph)
Bore X Stroke
54.0 x 54.0 mm (2.1 x 2.1 inches)
Compression
11.5:1
Displacement
124.00 ccm (7.57 cubic inches)
Cooling System
Liquid
Engine Details
Single cylinder, two-stroke
Transmission Type Final Drive
Shaft drive (cardan)
Fuel Capacity
8.50 litres (2.25 gallons)
Weight Incl Oil Gas Etc
91.0 kg (200.6 pounds)
Rear Tyre
4.00-18
Front Tyre
3.00-21
Rear Brakes
Expanding brake
Front Brakes
Expanding brake