KTM 400-660 LC4 1998-2005, Repair Manual

Page: 189 / 501

Repair manual KTM LC4
Art.-Nr
. 3.206.014 -E
8-25E
Check float level (Dell’Orto PHM 38ND / 40SD)
Stand the carburettor 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 bowl sealing surface (see
illustration).
Checking axial play of float (Dell’Orto PHM 38ND / 40SD)
For proper functioning of the float, there must be an axial play of 0.8
mm (0,03 in). If necessary, slightly abrade and deburr lateral float guide.
Adjust hot start device (Dell’Orto PHM 40SD)
If the hot start button was removed when cleaning the carburetor,
readjust the hot start device.
Install carburetor and adjust idling as discribed above. Then unlock nut
1
, press in hot start device
2
and adjust engine rev with adjusting
screw 3 to 2000-2500 rpm. Tighten locking nut.
Mixture too lean:
Not enough fuel in proportion to air
Mixture too rich:
Too much fuel in proportion to air
60°
0,8 mm
1
2
1
2
3