These are the known mechanical and performance specifications for your 2013 Rieju MRT Pro 50 SM.
Basic Specs

Engine
Displacement50.00 ccm (3.05 cubic inches)
Type
DetailsSingle cylinder, two-stroke
Max RPM
Compression
Bore/Stroke40.3 x 39.0 mm (1.6 x 1.5 inches)
Valves/Cylinder
FuelingCarburettor. Dell´Orto PHBN 16
Ignition
ExhaustRacing Muffler with aluminium silencer
LubricationSeparate mixture
CoolingLiquid
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity6.30 litres (1.66 gallons)
Emissions
Chassis
Frame TypeDouble cradle. Highly resistant steel perimeter
Rake
Trail
Front SuspensionMarzocchi inverted fork of Ø40mm.
Front Travel
Rear SuspensionGas Mono-shock shock absorber and seaprate bottle PRS system
Rear Travel
Seat
Seat Height850 mm (33.5 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,145 mm (45.1 inches)
Total Length2,070 mm (81.5 inches)
Total Width800 mm (31.5 inches)
Ground Clearance
Wheelbase1,380 mm (54.3 inches)
Dry Weight84.5 kg (186.3 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre100/80-17
Rear Tire/Tyre130/70-17
Front BrakesSingle disc. Galfer wave. radial mounted AJP gold series dual piston caliper.
Front Brake Diameter300 mm (11.8 inches)
Rear BrakesSingle disc. Wave disc
Rear Brake Diameter200 mm (7.9 inches)
Wheels


Comments
Spanish brand.