Cleaning The Air Filter; Adjusting The Throttle Cables - KTM 250 SX-F Owner's Manual

MAINTENANCE WORK ON CHASSIS AND ENGINE
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Cleaning the air filter *

The air filter must be cleaned prior to each race or whenever dust has
accumulated. To clean, lift the filter box cover [1].
Detach the filter retaining clip [2] at the bottom, swing aside and take the air
filter [3] and filter support [4] out of the filter box.
– Do not clean foam filter with fuel or petroleum since these damage the
foam. KTM recommends the products of the company Motorex for air filter
maintenance (Bio Dirt Remover and Liquid Bio Power).
– Never start your motorcycle without any air filters. Otherwise, dust and
dirt may penetrate and cause damage and increased wear.
– Dust and dirt can accumulate and damage the engine if the air filter is
not mounted correctly.
Thoroughly wash the air filter in special cleaning fluid 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. Also clean the air filter box. Check
the carburetor collar for damage and that it is filled correctly.
Place the air filter on the filter support and insert both in the center of the
filter box. Hold in place with the filter retaining clip.

Adjusting the throttle cables *

The throttle grip should always provide for a backlash of 3-5mm. Besides,
with the engine running, the idling speed must not change if you turn the
handlebar all the way to the left or right.
To adjust the throttle cables, dismount the seat and the tank together with
spoilers. Slide back the protection cover [5]. Loosen the counternut [6] and
turn the adjusting screw [7] accordingly. Turning the adjusting screw
counterclockwise will reduce the backlash, turning the adjusting screw
clockwise will increase the backlash.
Tighten the counternut and check whether the throttle grip can be
actuated smoothly. Mount tank and seat.
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