Exchanging The Brake Light And Tail Light Bulb; Cooling System - KTM 640 LC4 Owner's Manual

34
3

Exchanging the brake light and tail light bulb

Remove the cap
1
Turn the lamp socket
of the tail light housing.
Slightly depress the bulb, turn it approx. 30° counterclockwise and pull it
out of the socket.
To mount the lamp reverse the worksteps indicated above.
2
NOTE: Since the bulb on the tail end is subjected to higher vibrations,
heavy-duty bulbs are available from your KTM dealer.

Cooling system

Coolant is circulated by a water pump located in the engine. When the
engine is cold the cooling liquid circulates only through the cylinder and the
cylinder head. After the engine has reached its operating temperature
(about 70°C, 158°F), the thermostat opens and the cooling 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 coolant temperature will
rise. If the coolant temperature rises to 85°C (184°F), the fan
radiator will switch on. This fan will provide additional air circulation
through the radiator thereby preventing the cooling system from
overheating.
T
HE RED TEMPERATURE WARNING LAMP FOR THE COOLING LIQUID
BLINK WHEN THE COOLING LIQUID HAS REACHED APPROX
THE NORMAL OPERATING TEMPERATURE
P
OSSIBLE CAUSES
– S
LOW RIDING WITH LARGE LOADS AT A HIGHER AIR TEMPERATURE
I
F POSSIBLE INCREASE YOUR RUNNING SPEED
THROUGH THE RADIATORS
300
POSSIBLE CAUSES
– T
OO LITTLE COOLING LIQUID IN THE SYSTEM
L
ET THE ENGINE COOL DOWN
4
EXAMINE THE COOLING LIQUID LEVEL
DRIVE ON
NEAREST
LIQUID TEMPERATURE WARNING LIGHT ON
TO THE ENGINE
– T
HE COOLING FAN ON THE LEFT COOLER IS NOT WORKING
T
HE COOLING FAN MUST BE RUNNING
100°C (210°F)
APPEARS TO BE SUFFICIENT COOLING LIQUID
DRIVE ON TO YOUR NEAREST
– C
ONTINUOUS USE OF THE CLUTCH
A mixture of 40% antifreezer and 60% water is used as cooling liquid.
How-ever, the anti-freeze protection must be at least -25°C (-13°F). Aside
from antifreezing protection, this mixture also provides great corrosion
5
protection which is why it must not be replaced by pure water.
F
OR THE COOLING SYSTEM
F ). U
REEZE
COOLANT FOAMING
Pressure induced by heating of the cooling liquid in the cooling system is
controlled by a valve in the radiator cap
125°C (255°F) is admissible, without fear of problems.
1
on the underside of the license plate retainer.
2
approximately 30° counterclockwise and pull it out
!
CAUTION
.
:
. S
HOULD THE WARNING LIGHT STILL BE ON OFF AFTER
, ,
METERS STOP IMMEDIATELY SWITCH OFF THE ENGINE AND LOOK FOR OTHER
.
,
AND CHECK THE SYSTEM FOR LEAKAGE
CAUTION SCALDING HAZARD! D
,
UNTIL THERE IS SUFFICIENT LIQUID IN THE COOLING SYSTEM
KTM
GARAGE AND GET IT SEEN TO
.
,
WHEN THE COOLING LIQUID TEMPERATURE IS
AND THE IGNITION IS ON
KTM
GARAGE AT THE LEAST POSSIBLE ENGINE LOAD
(
RIDING THE CLUTCH
!
CAUTION
,
USE ONLY HIGH
SING LOWERGRADE ANTIFREEZE AGENTS
.
3 on the left
!
4
WILL BEGIN TO
. 120°C (246°F),
EXCEEDING
:
,
SO THAT MORE AIR CAN BLOW
:
'
S
. G
O TO YOUR
. I
F YOU DRIVE WITH THE COOLING
,
YOU WILL CAUSE EVEN MORE DAMAGES
:
. I ,
F THE FAN IS NOT WORKING AND THERE
,
THE ONLY THING YOU CAN DO IS TO
) .
AT LOWER SPEEDS
!
- (M
GRADE ANTIFREEZER OTOREX
,
CAN CAUSE CORROSION AND
5
; a water temperature rising up to
. A
LSO
O NOT
.
A -
NTI