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A5 engine data sheet



Engine versions: 49/40/25 km/h

Additional equipment: pre-mix pump, catalyzed exhaust, pedals

Basic technical specifications (49 km/h version)

Engine: single cylinder, two stroke, air cooled

Bore x stroke: 38 x 43 mm

Piston displacement: 49 cc

Compression ratio: 9.1:1

Power output: 1.8 kW/5200 min-1

Torque: 3.7 Nm/4000 min-1

Carburetor: Dell'orto SHA 14-12 P w. reed valve

Gearbox: 2-speed automatic with two centrifugal clutches

Gearbox oil/quantity: ATF Dextron III/220 cc

Transmission ratios:
Gear ratio 1 st speed (66/17) i = 3.8823
Gear ratio 2 nd speed (53/24) i = 2.2083
Gearbox ratio 1 st speed (3.88 * 72/11) i = 25.4117
Gearbox ratio 2 nd speed (2.20 * 72/11) i = 14.4545
Chain transmission ratio (24/26) i = 0.9230
Total transmission ratio 1 st speed (25.41 * 24/26) i = 23.4570
Total transmission ratio 2 nd speed (14.45 * 24/26) i = 13.3426

Ignition: electronic 12V/80W (12V/50W)

Spark plug: Bosch W 4A2/Champion L82/NGK HS

Spark plug gap: 0.5 mm

Mixture: gasoline and two stroke oil (2%)

Consumption: 1.8 l/100 km

Starting: kick starter


Transmission ratios
Transmission assembly
Thermal unit
Carburetor