These are the known mechanical and performance specifications for your 2021 QJmotor QJ350-13.
Basic Specs

Engine
Displacement353.0 ccm (21.54 cubic inches)
Type
DetailsTwin, four-stroke
Max RPM
Compression11.9:1
Bore/Stroke70.5 x 45.2 mm (2.8 x 1.8 inches)
Valves/Cylinder4
FuelingInjection
IgnitionTCI
Exhaust
LubricationForced and Splash
CoolingLiquid
Performance
Horespower28.2 HP (20.6 kW) @ 9000 RPM
Torque31.0 Nm (3.2 kgf-m or 22.9 ft.lbs) @ 7000 RPM
Top Speed
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity15.50 litres (4.10 US gallons)
Emissions
Chassis
Frame TypeCradle, steel
Rake
Trail
Front SuspensionTelescopic
Front Travel
Rear SuspensionUnit Swing
Rear Travel
Seat
Seat Height800 mm (31.5 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1100 mm (43.3 inches)
Total Length2080 mm (81.9 inches)
Total Width800 mm (31.5 inches)
Ground Clearance150 mm (5.9 inches)
Wheelbase1425 mm (56.1 inches)
Dry Weight
Wet Weight176.0 kg (388.0 pounds)
Wheels & Brakes
Front Tire/Tyre120/70-ZR17
Rear Tire/Tyre160/60-ZR17
Front BrakesSingle disc. Hydraulic.
Front Brake Diameter260 mm (10.2 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.