These are the known mechanical and performance specifications for your 2021 QJmotor QJ250-9.
Basic Specs

Engine
Displacement252.0 ccm (15.38 cubic inches)
Type
DetailsTwin, four-stroke
Max RPM
Compression9.0:1
Bore/Stroke55.0 x 53.0 mm (2.2 x 2.1 inches)
Valves/Cylinder
FuelingInjection
IgnitionTCI
Exhaust
LubricationForced/Splash
CoolingOil & air
Performance
Horespower17.4 HP (12.7 kW) @ 8000 RPM
Torque16.5 Nm (1.7 kgf-m or 12.2 ft.lbs) @ 6000 RPM
Top Speed
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity14.00 litres (3.70 US gallons)
Emissions
Chassis
Frame TypeCradle, steel
Rake
Trail
Front SuspensionTelescopic
Front Travel120 mm (4.7 inches)
Rear SuspensionUnit Swing
Rear Travel60 mm (2.4 inches)
Seat
Seat Height780 mm (30.7 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1110 mm (43.7 inches)
Total Length2070 mm (81.5 inches)
Total Width810 mm (31.9 inches)
Ground Clearance160 mm (6.3 inches)
Wheelbase1440 mm (56.7 inches)
Dry Weight
Wet Weight163.0 kg (359.4 pounds)
Wheels & Brakes
Front Tire/Tyre90/90-18
Rear Tire/Tyre130/90-15
Front BrakesSingle disc. Hydraulic.
Front Brake Diameter280 mm (11.0 inches)
Rear BrakesSingle disc. Hydraulic.
Rear Brake Diameter240 mm (9.4 inches)
Wheels
Comments
The Chinese firm QJMotor is owned by Qianjiang that has bought Benelli, Keeway, and KSR.