KTM 65 SX User Manual

19 TROUBLESHOOTING 74
Faults Possible cause Action
Engine overheats Radiator fins very dirty – Clean radiator fins.
Foam formation in cooling system –
Drain the coolant. x ( p. 63)
–
Refill the coolant. x ( p. 64)
Damaged cylinder head or cylinder
head gasket
– Check the cylinder head or cylinder head gas-
ket.
Bent radiator hose –
Change the radiator hose. x
Incorrect ignition point due to loose
stator
–
Adjust the ignition. x
White smoke emission (steam in
exhaust gas)
Damaged cylinder head or cylinder
head gasket
– Check the cylinder head or cylinder head gas-
ket.
Gear oil exits at the vent hose Too much gear oil added – Check the gear oil level. ( p. 68)
Water in the gear oil Damaged shaft seal ring or water
pump
– Check the shaft seal ring and water pump.

KTM 65 SX Specifications

General

Engine Type	1-cylinder, 2-stroke engine
Displacement	64.9 cm³
Bore x Stroke	45 mm x 40.8 mm
Starter	Kickstarter
Transmission	6-speed
Cooling	Liquid cooled
Rear Suspension	WP XACT Monoshock
Front Brake	Disc brake
Rear Brake	Disc brake
Front Brake Diameter	198 mm
Rear Brake Diameter	160 mm
Seat Height	750 mm
Tank Capacity	3.5 l
Weight (without fuel)	53 kg
Clutch	Wet multi-disc clutch, Formula hydraulics
Frame	Chromium-Molybdenum steel
Front Suspension	WP XACT USD, Ø 35 mm
Fuel System	Mikuni TMX 24 carburetor