KTM 250 SX-F 2006 Repair Manual

8-8
Repair manual KTM 250 -F Art.-No. 3.206.052-E
Assembling the carburetor
– Mount the idle-air jet 1 and the main air jet 2.
– Place the O-ring
3 in the groove and secure the intake trumpet to
the carburetor by means of the 2 screws.
– Insert the fuel port in the carburetor and fix with screw
4.
NOTE: In the mounted state, the connection piece must be easy to
turn.
– Mount the choke slide
5, the hot start knob 6 and actuate several
times, checking for smooth operation. Also make sure the choke and
the hot start knob lock into place.
– Thread the spring, the washer and the O-ring onto the mixture
control screw
7 and screw the mixture control screw in as far as it
will go.
– Now, unscrew the mixture control screw the number of turns written
down during disassembly.
NOTE: See the Technical Specifications for the basic carburetor
setting.
– Mount idling jet
8, starting jet 9 and needle jet together with main
jet
bk.
– Insert the needle valve seat
bl in the bore and fix with screw bm.
1
2
3
4
5
6
7
8
9
bk
bl
bm

KTM 250 SX-F 2006 Specifications

General

Engine Type	Single cylinder, 4-stroke
Displacement	249.5 cc
Compression Ratio	12.8:1
Cooling System	Liquid cooled
Starter	Kickstarter
Transmission	5-speed
Primary Drive	24:73
Final Drive	14:50
Clutch	Wet Multi-Disc Clutch, Hydraulically Operated
Bore x Stroke	76 mm x 54.8 mm
Fuel System	Keihin MX FCR 39 Carburetor
Ignition	Kokusan digital CDI
Lubrication	Pressure lubrication with 2 Eaton pumps