KTM 250 SX - Manual (Page 63)

Repair manual KTM 250 / 300 / 380
Art No 3206004 -E
Adjusting control flap (dimension “Z“)
Note: Dimension “Z“ is the distance from the lower edge of the control
flap to the upper edge of the cylinder, as measured in the centre of the
exhaust port.
– Undo the screws of the stop plate (left side of the cylinder) 1 and 2
and apply Loctite 243 to the threads. Then mount both screws but do
not tighten them yet.
– Set preselected value on depth gauge and fix.
– Swifel control flap upwards and hold depth gauge into cylinder as
shown in the illustration.
– Control flap must rest against depth gauge.
– Allow bump plate 3 to rest against retaining bracket 4 .
– Secure bump plate fastening screws 1 and 2 .
– Remove depth gauge.
– Having tightened the screws
1 + 2 , you have to check the dimension
"Z" again and correct it, if necessary.
– Press linkage of control flap 5 down-wards as far as stop and press
ball socket 6 onto ball of adjusting lever.
When pressing ball socket do not:
● pull the linkage too far up (max. 1 mm / 0.04 in).
● swivel control flap upwards.
– Adjust linkage length if necessary.
– To do so, loosen counter nut
7 and turn ball socket accordingly.
– Retighten counter nut.
– Once adjustments are completed, remove ball socket once again and
fit gasket for control cover.
– Refit ball socket and fit safety device 8 .
6-8C
1
2
3
4
5
6
7
8
control
flap
250 Model 1999 : 48,0 mm + 0,2 / - 0,6 mm
250 Model 2000 : 50,5 mm + 0,2 / - 0,6 mm
250 ab Model 2001 : 49,5 mm + 0,2 / - 0,6 mm
300 : 46,0 mm + 0,2 / - 0,6 mm
380 : 50,5 mm + 0,2 / - 0,6 mm