English – KTM 250 EXC 2004 User Manual
Page 40
ENGLISH
39
Refilling/Bleeding the cooling system
The cooling system must be bled as described below after draining the
cooling liquid or after adding more than 0.25 l (0.06 US gallons) cooling
liquid.
Make sure that the drain screw
1
is fastened.
Pour approx. 0.5 litres (0.13 US gallons) coolant into the system.
Remove screw
2
at the cylinder head. Reinstall it as soon as the cooling
liquid emerges free of air bubbles (only for 125/200 engines).
Remove the screw
3
on the right radiator.
Now add cooling liquid until it emerges free of bubbles at the right radia-
tor. Then immediately mount the screw so that no more air can enter the
right radiator.
Top up the left radiator until the coolant can be seen approx. 10 mm
(0.4 in) above the radiator fins.
Check the coolant level again after a short ride.
Cleaning the air filter *
The air filter must be cleaned prior to each race or whenever dust has accu-
mulated. To clean, lift the filter box cover
(see illustration) and pull off towards the front.
Detach the bottom of the filter retaining bracket
4
, tilt aside and remove
the throttle cap
5
and the air filter
6
and filter support
7
from the filter
box. The SX models do not have a throttle cap.
!
CAUTION
!
D
O NOT CLEAN THE AIR FILTER WITH FUEL OR PETROLEUM SINCE THESE WILL DAMAGE
THE FOAM
. KTM
RECOMMENDS THE PRODUCTS MADE BY
M
OTOREX FOR AIR FILTER
MAINTENANCE
.
FOR CLEANING PURPOSES AND TO OIL THE AIR FILTER
.
Thoroughly wash the air filter in special cleaning fluid (Motorex Bio Dirt
Remover) and allow it to dry well. Only press out the filter, do not wring it
out under any circumstances. Oil the dry air filter with a high-grade filter oil
(Motorex liquid Bio Power). Also clean the air filter box. Check the carbure-
tor collar for damage and that it is filled correctly.
Mount the air filter on the filter support. Insert the air filter and filter sup-
port in the throttle cap and mount them in the filter box, aligning in a cen-
tral position, and fix with the filter retaining bracket.
4
6
5
7
1
1
5
4
2
3