Checking The Jet Needle; Checking The Throttle Slide - KTM 450 SX ATV 2010 Repair Manual

31/CARBURETOR

Checking the jet needle

21.14

Checking the throttle slide

21.15
–
Connect the plus cable of the multimeter to the blue (bu) cable and the ground
cable to the black (bl) cable of the throttle position sensor connector. Measure the
total throttle position sensor resistance R
Guideline
Throttle position sensor, total resis-
tance R
tot
700063-10
–
Connect the plus cable of the multimeter to the yellow (ye) cable and the ground
cable to the black (bl) cable of the throttle position sensor connector.
–
Slowly open the throttle slide and measure the variable throttle position sensor
resistance R
Variable throttle position sensor, resis-
tance R (throttle slide fully open)
var
» If the value does not increase at a uniform rate:
–
Change the throttle position sensor.
700064-10
» If the value is outside of specifications:
–
Adjust the position of the throttle position sensor. (
Condition
The jet needle has been removed.
–
Check the jet needle for bending and wear of the coating.
» If the jet needle is bent, or the coating is damaged or worn:
–
Change the jet needle.
–
Check that the needle clip is firmly seated.
» If the needle clip is not firmly seated:
–
Change the needle clip or jet needle.
700052-10
Condition
The throttle slide has been removed.
–
Check the throttle slide rollers for damage and wear.
» If the throttle slide rollers do not turn smoothly, are worn or have flattened sur-
faces:
–
Change the throttle slide.
–
Except for the throttle slide valve
on the throttle slide.
» If the throttle slide rollers are loose:
–
Change the throttle slide.
–
Check the coating of the throttle slide and throttle slide plate
700055-10
wear.
» If the coating is damaged or worn:
–
Change the throttle slide.
–
Check the membrane
rect seating.
» If the membrane is damaged or brittle:
–
Change the membrane.
–
Check that membrane
» If the membrane is not correctly seated:
–
Position the membrane correctly.
700056-10
.
var
(removable), all rollers must be firmly seated

of the throttle slide plate for damage, brittleness and cor-

is correctly seated.

.
tot
4... 6 kΩ
3... 4.5 kΩ
p. 174)
for damage and

172