Built around Yamaha's sport motorcycle platform, the 2004 Yamaha TZR 50 relies on a 49.7 cc (3 cu in) single cylinder, two-stroke powerplant. Internal engine geometry specifies a bore and stroke of 40.3 x 39.0 mm (1.6 x 1.5 inches) with a 6.9:1 compression ratio.
On the scales, the TZR 50 measures 113 kg (249 lbs) dry. Rider ergonomics and chassis geometry center around a 815 mm (32.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,341 mm (52.8 in) wheelbase engineered for quick, flickable steering geometry.
Within MotoLibrary's Yamaha archive, this model family spans 5 indexed model years from 2003 to 2010, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
815 mm (32.1 in)
Engine
Displacement49.7 ccm (3.03 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Compression6.9:1
Bore x Stroke40.3 x 39.0 mm (1.6 x 1.5 inches)
Chassis
Front SuspensionHydraulic and telescopic fork
Rear SuspensionSwingarm
Wheelbase1341 mm (52.8 inches)
Ground Clearance151 mm (5.9 inches)
Wheels & Brakes
Front Tyre100/80-17
Rear Tyre130/70-17
Front BrakesSingle disc
Front Brake Ø280 mm (11.0 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Dry Weight113.0 kg (249.1 pounds)
Seat Height815 mm (32.1 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.
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.
