These are the known mechanical and performance specifications for your 2020 Herald Classic 400.
Basic Specs

Engine
Displacement400.0 ccm (24.41 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression
Bore/Stroke
Valves/Cylinder
FuelingCarburettor
Ignition
Exhaust
Lubrication
Cooling
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity12.00 litres (3.17 US gallons)
Emissions
Chassis
Frame TypeSteel
Rake
Trail
Front SuspensionTelescopic fork
Front Travel
Rear SuspensionTwin shocks
Rear Travel
SeatDual seat
Seat Height790 mm (31.1 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height
Total Length
Total Width
Ground Clearance
Wheelbase
Dry Weight165.0 kg (363.8 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre
Rear Tire/Tyre
Front BrakesDouble disc
Front Brake Diameter
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter
WheelsWire spoked
Comments
UK brand.