Built around Honda's sport motorcycle platform, the 1959 Honda RC142 utilizes a 124.7 cc (7.6 cu in) air-cooled twin, four-stroke layout. In factory specification, peak output is rated at 18.5 HP (13.5 kW) at 14,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 148.4 HP per liter, the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
On the scales, the RC142 measures 93 kg (205 lbs) wet (curb), translating to a power-to-weight ratio of 0.2 HP/kg (5.03 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,270 mm (50 in) wheelbase engineered for quick, flickable steering geometry.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
