KTM 250 SX 2003 User Manual

ENGLISH
38
BASIC CARBURETOR SETTING
Carburetor
Carburetor setting number
Main jet
Idling jet
Starting jet
Jet needle
Needle position from top
Slide
Air adjustment screw open
Performance restrictor
Power jet nozzle
250 SX
Keihin PWK 38-S AG
110202
178 (182)
50
85
N3CH(N3CW)
III
6,5
1
–
–
TECHNICAL DATA - ENGINE – MOTOR 250 SX 2003
Engine 250 SX
Desgin Liquid-cooled single-cylinder two-stroke engine with KTM Twin Valve Control exhaust system
Piston displacement 249 cm
3
Bore / stroke 66,4 / 72 mm (2.62 / 2.84 in)
Fuel
unleaded SUPER fuel, research octane no 95, mixed with high-grade, two- stroke oil (Shell Advance Racing X)
Oil / gasolino ratio 1:40 – 1:60 when using high grade, two- stroke oil. When in dout,
please contact your importer or use 1:40 mix ratio to be on the safe side
Crankshaft bearing 1 deep-groove ball bearing / 1 cylinder roller bearing
Connecting rod bearing needle bearing
Piston pin bearing needle bearing
Piston cast piston
Piston ring one plain compression ring
Dimension “X“ 0 + 0,1 mm (0 + 0.004 in)
Ingition timing 1,9 mm vor OT
Spark plug BR 8 ECM
Electrode gap 0,60 mm
Dimension “Z“ 48,5 mm (1.9 in)
TVC start open 5200/min
TVC fully open 7000/min
Primary drive straight cut spur gears, primary ratio 26:72
Clutch multiple disc clutch in oil bath, hydraulically operated (Shell HF-E15)
Transmission 5 speed, claw actuated
Gear ratio
1
st
gear 14:28
2
nd
gea 16:26
3
rd
gea 18:24
4
th
gea 21:24
5
th
gea 22:21
Gear lubrication 0,7 l engine oil 10W-40 (Shell Advanced Ultra 4)
Ailable chain sprockets
13Z / 14Z / 15Z für Kette
5
/
8
x
1
/
4
"
Coolant 1.3 liters, 40% antifreeze, 60% water, at least -25 °C (-13 °F)
Ignition system KOKUSAN 2K-1
Generator output no generator
Carburetor flat-slide carburetor, carburetor setting see table
Air- filter wet foam type air filter insert
(upper edge piston -
upper edge cylinder)
(height of the
control flap)

KTM 250 SX 2003 Specifications

General

Brand	KTM
Model	250 SX 2003
Category	Motorcycle
Language	English