KTM 50 JR ADVENTURE 2000, Owner'S Handbook Manual

Page: 20 / 22

ENGLISH
20
TECHNICAL DATA – ENGINE S5-E, S5-GS 2001
Engine S5-E S5-GS
(50 Mini Adventure) (50 SX Junior / 50 JR Adventure
50 SX Senior / 50 SR Adventure)
Design air cooled single cylinder 2-stroke engine air cooled single cylinder 2-stroke engine with reed valve inlet
Displacement 49.8 ccm
Bore/Stroke 39 / 41.7 mm
Compression ratio 9 : 1
Fuel SUPER fuel, research octane no 95, mixed with 2-stroke oil
Oil/gasoline ratio 1 : 40 when using high grade 2-stroke oil (Shell Advance Racing X)
When in doupt, please contact your importer or use 1 : 33 mix ratio to be on the safe side
Lubrication mixture lubrication
Crankshaft bearing 2 grooved ball bearing
Connecting rod bearing needle bearing
Piston pin bearing needle bearing
Piston rings 1 L-ring, 1 rectangular ring 2 rectangular ring
Primary drive helical gears, 15 : 52 t, cast helical gears, 15 : 52 t, milled
Transmission oil 0.25 l gear oil, Shell Advance EP 80
Spark plug Bosch W 4 AC
Electrode gap 0.6 mm
Carburetor DellOrto SHA 1412 50 SX Junior: Mikuni VM 18-144
50 JR Adventure: Mikuni VM14-117
50 SX Senior / 50 SR Adventure: Mikuni VM 18-144
Air filter wet foam type air filter insert
Type Dell’Orto SHA 1412 Mikuni VM 14-117 Mikuni VM 18-144
Main jet 60 90 70
Needle jet –– D-8 145
Idling jet –– 25 30
Jet needle –– 3DJ3-3 4F18-4
Needle position from top –– 3rd 4th
Air/Mixture reg. screw open –– 2,0 turn 1.5 turn
Throttle valve –– 2,5 1
BASIC CARBURETOR SETTING
Hexagon nut primary gear M12x1,25 40 Nm (30 ft.lb)
Hexagon nut flywheel M8 35 Nm (25 ft.lb)
Nut for clutch hub M10 Loctite 243 + 35 Nm (25 ft.lb)
Nuts cylinder head M6 12 Nm (8 ft.lb)
Nuts exhaust pipe M6 12 Nm (8 ft.lb)
Oil drain plug M8 15 Nm (10 ft.lb)
Other screws engine M5 7 Nm (5 ft.lb)
M6 10 Nm (7 ft.lb)
TIGHTENING TORQUES - ENGINE