KTM 690 Duke 2018 User Manual

COOLING SYSTEM 16
173
16.1 Cooling system
K00436-10
Water pump
1
in the engine ensures forced circulation of the
coolant.
The pressure resulting from the warming of the cooling system is
regulated by a valve in radiator cap
2
. Heat expansion causes
excess coolant to flow into compensating tank
3
. When the tem-
perature 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.
115 °C (239 °F)
402773-10
The coolant is cooled by the air stream and a radiator fan
4
,
which is controlled by a thermoswitch.
The lower the speed, the less the cooling effect. Dirty cooling fins
also reduce the cooling effect.

KTM 690 Duke 2018 Specifications

General

Engine Type	Single-cylinder, 4-stroke
Displacement	690 cc
Torque	74 Nm @ 6, 500 rpm
Compression Ratio	12.7:1
Transmission	6-speed
Fuel System	Electronic fuel injection
Cooling System	Liquid cooled
Front Suspension	WP USD Ø 43 mm
Rear Suspension	WP Monoshock
Seat Height	835 mm
Dry Weight	148.5 kg
Fuel Capacity	14 liters
Bore x Stroke	105 mm x 80 mm
Starter	Electric starter
Front Wheel	3.50 x 17"
Rear Wheel	5.00 x 17"
Front Tire	120/70 ZR 17
Rear Tire	160/60 ZR 17
Power	73 hp (54 kW) @ 8, 000 rpm
Front Brake	Brembo four-piston radial caliper, 320 mm disc
Rear Brake	Brembo single-piston floating calliper, brake disc Ø 240 mm
ABS	Bosch 9M+ Two Channel ABS
Frame	Chromium-Molybdenum steel trellis frame, powder-coated