ENGINE TECHNICAL DATA
Type
single-cylinder, four-stroke, four
valves, air-cooled
Bore
39 mm
Stroke
41.8 mm
Cubic capacity
49.93 cm³
MAX. Power
3.2 kW at 8250 rpm
MAX. torque
3.8 Nm at 7750 rpm
Compression ratio
11.5 - 12.5 1
Timing system
single overhead camshaft,
controlled by a chain on the left-
hand side, three-arm rocking
levers and pads calibrated for
valve clearance adjustment.
Engine idle speed
1700 ÷ 1900
Starting system
electric starter/kick starter
Lubrication
engine lubrication with lobe pump
(in the crankcase), chain-driven.
Mesh pre-filter and centrifugal filter
on the crankshaft
Fuel supply
Gravity feed, with unleaded petrol
(with a minimum octane rating of
95) with carburettor.
Valve clearance (when cold)
intake 0.10 mm
63
4 Technical data
Summary of Contents for S 50 4T 4V
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Page 7: ...Vespa S 50 4T 4V Chap 01 Vehicle 7 ...
Page 9: ...01_01 9 1 Vehicle ...
Page 10: ...01_02 10 1 Vehicle ...
Page 19: ...Vespa S 50 4T 4V Chap 02 Use 19 ...
Page 30: ...30 2 Use ...
Page 31: ...Vespa S 50 4T 4V Chap 03 Maintenance 31 ...
Page 45: ...03_25 03_26 03_27 45 3 Maintenance ...
Page 61: ...Vespa S 50 4T 4V Chap 04 Technical data 61 ...
Page 62: ...04_01 62 4 Technical data ...
Page 67: ...Vespa S 50 4T 4V Chap 05 Spare parts and accessories 67 ...
Page 69: ...Vespa S 50 4T 4V Chap 06 Programmed maintenance 69 ...