KTM 690 SMC R User Manual

15 COOLING SYSTEM 134
15.1 Cooling system
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The water pump

in the engine forces the coolant to flow.
The pressure in the cooling system resulting from heat is regulated by a valve in the radia-
tor cap

. The heat expansion causes the surplus coolant to flow into the compensating
tank

. When the temperature falls, this surplus coolant is sucked back into the cooling
system. This permits the specified coolant temperature without causing any malfunctions.
125 °C (257 °F)
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Cooling takes place by means of the air stream and a radiator fan

, which is controlled
by a thermoswitch.
The lower the speed, the less the cooling effect. Dirty cooling fins also reduce the cooling
effect.
15.2 Checking the antifreeze and coolant level
Warning
Danger of scalding During motorcycle operation, the coolant gets very hot and is under pressure.
– Do not remove the radiator cap, radiator hoses or other cooling system components when the engine is hot. Allow the engine
and cooling system to cool down. In case of scalding, rinse immediately with lukewarm water.

KTM 690 SMC R Specifications

General

Engine Type	Single-cylinder, 4-stroke
Bore x Stroke	105 mm x 80 mm
Compression Ratio	12.7:1
Starter	Electric starter
Transmission	6-speed
Fuel System	Electronic Fuel Injection
Cooling System	Liquid cooled
Frame	Chromium-Molybdenum steel trellis frame, powder coated
Front Wheel	3.50 x 17"
Rear Wheel	5.00 x 17"
Front Tire	120/70 ZR 17
Rear Tire	160/60 ZR 17
Seat Height	890 mm
Power	55 kW (74 hp)
Torque	73.5 Nm
Front Suspension	WP APEX 48
Rear Suspension	WP APEX with Pro-Lever linkage
Front Brake	Single 320 mm disc, 4-piston caliper
Rear Brake	Single 240 mm disc, 1-piston caliper
ABS	Bosch 9.1 MP (lean angle sensitive)
Fuel Tank Capacity	13.5 liters
Dry Weight	147 kg