Uploaded December 2025 | Updated September 2026, 1 day ago
1991 Honda RS125R
is a legendary, high-performance, two-stroke single-cylinder pure racing motorcycle designed for Grand Prix and club racing, It was the machine that launched the careers of many MotoGP champions, including Dani Pedrosa and Loris Capirossi.
Key Specifications & Features (NF4 Model)
Engine: Liquid-cooled 124.4 cc two-stroke single engine with reed valve induction.
Power: The factory-claimed maximum power was around 39 horsepower (32.3 kW) at 12,250 rpm, with highly tuned versions reaching up to 44 hp.
Weight: Extremely lightweight, with a semi-dry weight of approximately 71.5 kg (157 lbs), giving it an exceptional power-to-weight ratio.
Transmission: A close-ratio 6-speed constant-mesh sequential manual transmission.
Frame: Features an aluminum twin-tube beam frame and a braced swinging arm introduced in 1990.
Carburetion: Equipped with a 38mm Keihin PJ carburetor (with TH sensor & PWJ) for the 1991 model year, an increase in size from previous years.
Suspension & Brakes: Showa inverted telescopic forks and a single Showa rear shock absorber, paired with HRC/Nissin single disc brakes front and rear.
1991 Honda RS125R
is a legendary, high-performance, two-stroke single-cylinder pure racing motorcycle designed for Grand Prix and club racing, It was the machine that launched the careers of many MotoGP champions, including Dani Pedrosa and Loris Capirossi.
Key Specifications & Features (NF4 Model)
Engine: Liquid-cooled 124.4 cc two-stroke single engine with reed valve induction.
Power: The factory-claimed maximum power was around 39 horsepower (32.3 kW) at 12,250 rpm, with highly tuned versions reaching up to 44 hp.
Weight: Extremely lightweight, with a semi-dry weight of approximately 71.5 kg (157 lbs), giving it an exceptional power-to-weight ratio.
Transmission: A close-ratio 6-speed constant-mesh sequential manual transmission.
Frame: Features an aluminum twin-tube beam frame and a braced swinging arm introduced in 1990.
Carburetion: Equipped with a 38mm Keihin PJ carburetor (with TH sensor & PWJ) for the 1991 model year, an increase in size from previous years.
Suspension & Brakes: Showa inverted telescopic forks and a single Showa rear shock absorber, paired with HRC/Nissin single disc brakes front and rear.
