These are the known mechanical and performance specifications for your 2017 Rieju RS3 NKD 125.
Basic Specs

Engine
Displacement125.00 ccm (7.63 cubic inches)
TypeMinarellei-Yamaha engine
DetailsSingle cylinder, four-stroke
Max RPM
Compression
Bore/Stroke52.0 x 58.6 mm (2.0 x 2.3 inches)
Valves/Cylinder4
FuelingCarburettor. Keihin CVEK 30
IgnitionCDI
ExhaustExhaust pipe with aluminium silencer
Lubrication
CoolingLiquid
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity12.00 litres (3.17 gallons)
Emissions
Chassis
Frame TypeTriangular double cradle double steel tube
Rake
Trail
Front SuspensionInverted fork, 41mm
Front Travel
Rear SuspensionMono-shock shock absorber, adjustable
Rear Travel
Seat
Seat Height845 mm (33.3 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,090 mm (42.9 inches)
Total Length2,020 mm (79.5 inches)
Total Width770 mm (30.3 inches)
Ground Clearance
Wheelbase1,375 mm (54.1 inches)
Dry Weight128.0 kg (282.2 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre100/80-17
Rear Tire/Tyre130/80-17
Front BrakesSingle disc. Double piston caliper
Front Brake Diameter280 mm (11.0 inches)
Rear BrakesSingle disc
Rear Brake Diameter220 mm (8.7 inches)
Wheels
Comments
Spanish made bike.