Checking The Float Level; Checking The Oil Level Of The Hydraulic Clutch; Bleeding Of The Hydraulic Clutch - KTM 125 SX Owner's Handbook Manual

JET NEEDLE
TYPE RICHER
NOZD
NOZE
NOZF
NOZG
NOZH
60°
24
5
4
6
RANGE OF ACTION
LEANER
2
1
3
C
Part-throttle range
Operation with partly open throttle valve. This range is only influenced by
the jet needle (shape and position). The optimum part-throttle setting is
controlled by the idling setting in the lower range and by the main jet in the
upper range. If the engine runs on a four-stroke cycle or with reduced
power when it is accelerated with the throttle partly open, the jet needle
must be lowered by one notch. If then the engine pings, especially when
accelerating under full power at maximum engine revs, the jet needle
should be raised.
If these faults should occur at the lower end of the part throttle range at a
four-stroke running, make the idling range leaner; if the engine pings,
adjust the idling range richer.
D
Full throttle range
Operation with the throttle fully open (flat out). This range is influenced by
the main jet and the jet needle. If the porcelain of the new spark plug is
found to have a very bright or white coating or if the engine rings, after a
short distance of riding flat out, a larger main jet is required. If the porcelain
is dark brown or black with soot the main jet must be replaced by a smaller
one.

Checking the float level *

Arrange the Keihin carburetor diagonally at about 60° so that the spring
in the float needle valve is not pressed together. In this position, the edge
of the float should be parallel with the float chamber sealing surface (see
illustration).

Checking the oil level of the hydraulic clutch

To check the oil level in the master cylinder of the clutch remove the
cover. For this purpose, remove screws
the rubber boot 3 . The oil level in the horizontal master cylinder should
be 4 mm below the upper edge. If necessary add SAE 10 hydraulic oil
!
O SAE 10
NLY USE MINERAL HYDRAULIC OIL
. N
MASTER CYLINDER EVER USE BRAKE FLUID

Bleeding of the hydraulic clutch

For bleeding, the cover of the master cylinder of the clutch needs to be
removed. For this purpose, remove screws
with rubber bellows 3 . At the slave cylinder of the clutch, remove the blee-
4
der nipple . It its place, mount the bleeder syringe
SAE 10 hydraulic oil. Refill oil, until oil is discharged from the bore
master cylinder in a bubble-free state. Make sure that the oil does not over-
flow. The bleeder syringe can be purchased at your KTM dealer.
!
H
AVING COMPLETED THE BLEEDING PROCEDURE
LEVEL IN THE MASTER CYLINDER IS CORRECT
SAE 10
MINERAL HYDRAULIC OIL ONLY
1 and cover 2
CAUTION
(Shell Naturelle HF-E15)
!
1
and take off cover
5
which is filled with
CAUTION
,
YOU HAVE TO VERIFY THAT THE OIL
.
FOR FILLING OF THE MASTER CYLINDER
; !
NEVER USE BRACKE FLUID
together with
!
TO REFILL THE
2
together
6
of the
!
,
USE