KTM 250 DUKE User Manual

15 COOLING SYSTEM 133
15.1 Cooling system
101909-10
Water pump

in the engine circulates the coolant.
The pressure resulting from the warming of the cooling system is regulated by a valve in
radiator cap

. Heat expansion causes excess coolant to flow into compensating tank

.
When the temperature falls, this surplus coolant is sucked back into the cooling system.
This ensures that operating the vehicle at the specified coolant temperature will not result
in a risk of malfunctions.
125 °C (257 °F)

KTM 250 DUKE Specifications

General

Engine Type	1-cylinder, 4-stroke engine
Displacement	248.8 cc
Max Torque	24 Nm @ 7, 500 rpm
Transmission	6-speed
Cooling System	Liquid cooled
Rear Suspension	WP monoshock
Seat Height	830 mm
Dry Weight	149 kg
Bore x Stroke	72 mm x 61.1 mm
Compression Ratio	12.5:1
Ground Clearance	185 mm
Max Power	22.1 kW (30 hp) @ 9, 000 rpm
Fuel System	Bosch Electronic Fuel Injection (EFI)
Front Suspension	WP upside-down fork
Front Brake	Four-piston radial fixed caliper, brake disc
Rear Brake	Single-piston floating caliper, brake disc
Fuel Tank Capacity	13.4 l
Frame	Steel trellis frame