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8-5E
Repair manual KTM MINI 50 air/liquid cooled Art.-Nr. 3.206.028 -E
TECHNICAL DATA - ENGINE 50 AC/LC 2003
Engine
50 AC (aircooled) 50 LC (liquid cooled)
Design single cylinder 2-stroke engine, with reed valve inlet
Displacement 49,0 cm³
Bore/Stroke 39,5 / 40 mm
Fuel SUPER fuel, research octane no 95, mixed with 2-stroke oil (separate lubrication only ROZ 95)
Oil/gasoline ratio
1 : 40 when using high grade 2-stroke oil (Shell Advance Racing X)
(separate lubrication Shell Advance Ultra 2)
Lubrication mixture lubrication / separate lubrication
Crankshaft bearing 2 grooved ball bearing
Connecting rod bearing needle bearing
Piston pin bearing needle bearing
Piston rings 1 rectangular ring
Primary drive straight cut spur gears, 16 : 57 t
Transmission oil 0.15-0.2 liter gear oil Dexron II (Shell Donax TA)
Spark plug NGK BR 8 ECM
Electrode gap 0,6 mm (0.0236 in)
Carburetor Dell'Orto PHVA 14 DS / 12 XS Dell'Orto PHVA 14 DS / PHBG 19 BS
Air filter wet foam type air filter insert
Coolant – 0.5 liter (0.132 USgal) ; water : coolant = 2 : 1
BASIC CARBURETOR SETTING
Model
Type
50 MINI ADVENTURE
(Separate lubrication)
Dell'Orto PHVA 12 XS
50 JUNIOR/SENIOR
ADVENTURE
Dell'Orto PHVA 14 DS
50 SX PRO JUNIOR LC
Dell'Orto PHVA 14 DS
50 SX PRO SENIOR LC
Dell'Orto PHBG 19 BS
Main jet 60 80 (70) 80 85
Needle jet 211 FA 211 FA 211 FA 260 AU
Idling jet 38 45 45 48
Jet needle A10 A10 A10 W9
Needle position from top 4. 3. 3. 3.
Air/Mixture reg. screw open 4 3,5 3,5 3,0
Slide 40 40 40 60
Starting jet 60 60 60 60