Built around Yamaha's enduro - offroad motorcycle platform, the 1980 Yamaha MR50 relies on a 49 cc (3 cu in) air-cooled single cylinder, two-stroke powerplant. Internal engine geometry specifies a bore and stroke of 40.0 x 39.7 mm (1.6 x 1.6 inches) with a 6.0:1 compression ratio.
On the scales, the MR50 measures 77 kg (170 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 740 mm (29.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,180 mm (46.5 in) wheelbase engineered for quick, flickable steering geometry. The 6.5-liter (1.7 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 100 km/h (62 mph).
Standover Height
740 mm (29.1 in)
Engine
Displacement49.0 ccm (2.99 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Compression6.0:1
Bore x Stroke40.0 x 39.7 mm (1.6 x 1.6 inches)
Fuel SystemCarburettor. VM16SH carburetor
Ignitionmagneto ignition
CoolingAir
Transmission
ClutchWet multi-disc
Performance
Top Speed100.0 km/h (62.1 mph)
ExhaustSingle pipe
Chassis
Frame TypeSemi-double cradle, steel tubular
Rake27.3°
Trail94 mm (3.7 inches)
Front SuspensionTelescopic
Rear SuspensionSwing arm monocross suspension
Wheelbase1180 mm (46.5 inches)
Ground Clearance205 mm (8.1 inches)
Wheels & Brakes
Front Tyre2.50-18-4PR
Rear Tyre3.00-16-4PR
Front BrakesExpanding brake (drum brake). Mechanical drum brake Leading - Trailing
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.
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.
