TECHNICAL DATA - ENGINE 123
Design 1-cylinder 2-stroke engine, water-cooled, with reed intake
Displacement 49.0 cm³ (2.99 cu in)
Stroke 40 mm (1.57 in)
Bore 39.5 mm (1.555 in)
Crankshaft bearing 2 grooved ball bearings
Conrod bearing Needle bearing
Piston pin bearing Needle bearing
Pistons Aluminum cast
Piston rings 1 rectangular ring
Engine lubrication (50 SX) Mixture oil lubrication
Engine lubrication (50 SX Mini) Separate lubrication
Primary transmission 61:33 straight cut spur gear
Clutch 3-lining automatic clutch on the main shaft / centrifugal force
Gearbox Rigid 1-stage reduction gear
Transmission ratio 19:42
Ignition SELETTRA 2p D36
Spark plug NGK LR 8 B
Spark plug electrode gap 0.60 mm (0.0236 in)
Cooling Water-cooled
Starting aid Kickstarter
24.1Capacity - gear oil
Gear oil 0.20 l (0.21 qt.) Gear oil (ATF Dexron 3) ( p. 138)
24.2Capacity - coolant
Coolant 0.5 l (0.5 qt.) Coolant ( p. 138)
Coolant (mixed ready to use) ( p. 138)
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