Specifications; Technical Data - Engine - KTM 50 SX Owner's Manual

TECHNICAL DATA – ENGINE
ENGINE
Design
Displacement
Bore/Stroke
Fuel
Oil/gasoline ratio
Lubrication
Crankshaft bearing
Connecting rod bearing
Piston pin bearing
Piston rings
Primary drive
Transmission oil
Spark plug
Electrode gap
Carburetor
Air filter
Cooling liquid
BASIC CARBURETOR SETTING
Model
Type
Main jet
Needle jet
Idling jet
Jet needle
Needle position from top
Air/Mixture reg. screw open
Slide
Starting jet
TIGHTENING TORQUES - ENGINE
Primary gear nut
Hexagon nut ignition rotor
Nut of clutch hub
Cylinder head screws
Cylinder base nuts
Allan head screw-Stator
Oil plug
Oil drain plug
Other engine screws
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50 SX JUNIOR
single cylinder 2-stroke engine, with reed valve inlet
49.0 cc
39.5 / 40 mm
SUPER fuel, research octane no 95, mixed with 2-stroke oil
1 : 60 when using high grade 2-stroke oil (Motorex 2T Cross Power) When in doubt,
please contact your importer
mixture lubrication
2 grooved ball bearing
needle bearing
needle bearing
1 rectangular ring
straight cut spur gears, 16 : 57 Z
0.15-0,2 liter automatic gear oil Dexron II (Motorex Topspeed 4T 15W50)
NGK BR 8 ECM
0.6 mm
Dell'Orto PHVA 14 DS
wet foam type air filter insert
0.5 litres, 50% antifreeze, 50% distilled water, at least -25 °C (-13 °F)
50 SX Junior
Dell'Orto PHVA 14 DS
80
211 FA
45
A10
3.
3.5
40
60
M14x1,25
M10x1,25
M10x1,25
M7
M8
M5x25
M16
M10
M5
M6
M8
50 SX
Dell'Orto PHBG 19 BS
50 SX
Dell'Orto PHBG 19 BS
85
260 AU
48
W9
3.
3.0
60
60
Loctite 243 + 35 Nm
Loctite 243 + 8 Nm
35
40 Nm
20 Nm
15 Nm
18 Nm
5 Nm
15 Nm
7 Nm
10 Nm
30 Nm