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8-12E
TYP 50 SX PRO JUNIOR LC 50 SX PRO SENIOR LC
Design single cylinder 2-stroke engine, with reed valve inlet
Displacement 49.0 ccm
Bore/Stroke 39.5 / 40 mm
Fuel SUPER fuel, research octane no 95, mixed with 2-stroke oil
Oil/gasoline ratio
1 : 40 when using high grade 2-stroke oil (Motorex 2T Cross Power)
When in doubt, 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 rectangular ring
Primary drive straight cut spur gears, 16 : 57 Z
Transmission oil 0.15-0,2 liter automatic gear oil Dexron II (Motorex Topspeed 4T 15W50)
Spark plug NGK BR 8 ECM
Electrode gap 0.6 mm
Carburetor DellOrto PHVA 14 DS Dell’Orto PHBG 19 BS
Air filter wet foam type air filter insert
Cooling liquid 0.5 litres, 40% antifreeze, 60% water, at least -25 °C (-13 °F)
TECHNICAL DATA – ENGINE 2005 LC
BASIC CARBURETOR SETTING
Model 50 SX PRO JUNIOR LC 50 SX PRO SENIOR LC
Type Dell’Orto PHVA 14 DS Dell’Orto PHBG 19 BS
Main jet 80 85
Needle jet 211 FA 260 AU
Idling jet 45 48
Jet needle A10 W9
Needle position from top 3. 3.
Air/Mixture reg. screw open 3.5 3.0
Slide 40 60
Starting jet 60 60