Engineered by Yamaha for the sport motorcycle segment, the 1964 Yamaha YDS 3 relies on a 246 cc (15 cu in) air-cooled twin, two-stroke powerplant. In factory specification, peak output is rated at 24 HP (17.5 kW) at 7,500 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 97.6 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the YDS 3 measures 156 kg (344 lbs) dry, translating to a power-to-weight ratio of 0.15 HP/kg (6.5 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,318 mm (51.9 in) wheelbase engineered for quick, flickable steering geometry. The 11.36-liter (3 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 132 km/h (82 mph).
Within MotoLibrary's Yamaha archive, this model family spans 3 indexed model years from 1964 to 1966, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
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.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
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.
