Checking Spoke Tension; Cooling System - KTM DUKE 640 e Owner's Handbook Manual

– Tire pressure should be checked regularly on a "cold" tire. Proper pres-
sure ensures optimum driving comfort and extends the life of your tires.
– D
O NOT MOUNT TIRES WHICH HAVE NOT BEEN APPROVED BY
COULD HAVE ADVERSE EFFECTS ON THE WAY YOUR MOTORCYCLE RIDES
– T
HE FRONT AND REAR WHEEL ARE ONLY ALLOWED TO BE TIRED WITH TIRES THAT
HAVE THE SAME PROFILE TYPE
– F
OR YOUR OWN SAFETY REPLACE DAMAGED TIRES IMMEDIATELY
– W
ORN TIRES CAN HAVE A NEGATIVE EFFECT ON HOW YOUR MOTORCYCLE PER
FORMS
– I
F AIR PRESSURE IS TOO LOW
CAN RESULT
– W
HEN MOUNTING TIRES YOURSELF KEEP IN MIND THAT THE REAR WHEEL NEEDS A
REINFORCED TUBE
– F
OR CORRECT TUBE POSITIONING AFTER MOUNTING THE TIRE FILL THE TUBE WITH
AIR UNTIL THE TIRE RESTS CORRECTLY AGAINST THE RIM
AND INFLATE IT TO NORMAL OPERATING PRESSURE
operator only
operator plus passenger

Checking spoke tension

The correct spoke tension is very important for the stability of the wheels
and thus for riding safety. A loose spoke causes the wheel to become
unbalanced and before long other spokes will have come loose. Check
spoke tension, especially on a new motorcycle, in regular intervals. For
checking, tap on each spoke with the blade of a screw driver (see illustra-
tion). A clear tone must be the result. Dull tones indicate loose spokes. If
necessary, have the spokes retightened and the wheel centered by a KTM
dealer.

Cooling system

Cooling liquid is circulated by a water pump
When the engine is cold the cooling liquid circulates only through the
cylinder and the cylinder head. After the engine has reached its operating
1
temperature (about 70° C, 158° F), the thermostat
ling liquid is also pumped through both aluminum radiators.
Air blowing in through the radiators cools the cooling liquid. The slower
the speed of the motorcycle, the less the cooling liquid is cooled down.
Dirty radiator fins also reduce the cooling efficiency.
If little or no air blows through the radiators, for example when riding
through slow traffic or waiting at traffic lights, the cooling liquid tempera-
ture will rise. If the cooling liquid temperature rises to 85° C (185° F), the
fan on the left radiator will switch on. This fan will provide additional air
circulation through the radiator thereby preventing the cooling system
from overheating.
I
F THE RED COOLING LIQUID TEMPERATURE WARNING LAMP LIGHTS UP
LIKELY BE DUE TO A DEFECT IN THE COOLING SYSTEM
AND TURN OFF THE ENGINE
SYSTEM FOR LEAKS
SCALDING HAZARD! D
2
COOLING SYSTEM
IN ORDER TO HAVE THE DEFECT REMEDIED
NING LAMP IS LIT
I
F THE RADIATOR CAP IS REMOVED WHEN THE ENGINE IS HOT
THAT IS UNDER PRESSURE
WARNING
.
,
ESPECIALLY ON WET SURFACES
,
ABNORMAL WEAR AND OVERHEATING OF THE TIRE
.
(B 17 CR).
RIDESTONE
front tyre air pressure
2,0 bar
2,2 bar
CAUTION
!
. L
ET THE ENGINE COOL DOWN AND CHECK THE COOLING
. A
LSO CHECK IF THERE IS ENOUGH COOLING LIQUID
O NOT DRIVE ON
. H ,
OWEVER CALL ON ONE OF
. I
,
YOU WILL DAMAGE YOUR ENGINE
WARNING
,
CAN SPRAY OUT AND CAUSE SEVERE BURNS
KTM. O
THER TIRES
.
.
. T
HEN DEFLATE THE TUBE
( ).
SEE BELOW
rear tyre air pressure
2,2 bar
2,4 bar
1
located in the engine.
2
opens and the coo-
!
,
THIS WILL MOST
. I ,
N THIS CASE STOP IMMEDIATELY
. CAUTION -
,
UNTIL THERE IS SUFFICIENT LIQUID IN THE
KTM'
S DEALERS AS SOON AS POSSIBLE
F YOU DRIVE ON EVEN THOUGH THE WAR
.
,
HOT COOLING LIQUID
.
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,