Built around Yamaha's minibike, cross motorcycle platform, the 2004 Yamaha PW 50 pairs a 49 cc (3 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 2.7 HP (2 kW) at 2,700 rpm while maximum torque reaches 3.8 Nm (2.8 lb-ft), transferring power to the rear wheel through a automatic gearbox and chain final drive. Internal engine geometry specifies a bore and stroke of 40.0 x 39.2 mm (1.6 x 1.5 inches) with a 6.0:1 compression ratio.
On the scales, the PW 50 measures 37 kg (82 lbs) dry. Rider ergonomics and chassis geometry center around a 485 mm (19.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 855 mm (33.7 in) wheelbase engineered for quick, flickable steering geometry.
Within MotoLibrary's Yamaha archive, this model family spans 5 indexed model years from 2002 to 2007, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
485 mm (19.1 in)
Engine
Displacement49.0 ccm (2.99 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power2.7 HP (2.0 kW)) @ 2700 RPM
Torque3.8 Nm (0.4 kgf-m or 2.8 ft.lbs)
Compression6.0:1
Bore x Stroke40.0 x 39.2 mm (1.6 x 1.5 inches)
Valves/Cylinder1
Fuel SystemInjection
CoolingAir
Transmission
GearboxAutomatic
Final DriveChain (final drive)
Chassis
Front SuspensionTelescopic fork
Front Travel60 mm (2.4 inches)
Rear SuspensionUnit swing
Rear Travel50 mm (2.0 inches)
Wheelbase855 mm (33.7 inches)
Ground Clearance105 mm (4.1 inches)
Wheels & Brakes
Front BrakesExpanding brake (drum brake)
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight37.0 kg (81.6 pounds)
Power/Weight0.0724 HP/kg
Seat Height485 mm (19.1 inches) If adjustable, lowest setting.
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.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
