Lambretta I 50 Special

Lambretta I 50 Special.

Technical Specification

Model	I 50 Special
Amount Produced	13599
Production Dates	April 1970 – May 1971
Frame Prefix	50DL (20/4)
Engine Prefix	j50
Frame Starting Number	507001
Engine Starting Number	507001
Homologation	5520 OM
Engine	49.8cc, two stroke, 38x44mm
Power and Rate	1.47hp at 4500rpm
Compression Ratio	1:7.75
Head and Cylinder	Aluminium and cast iron
Engine Cooling	Forced Air
Ignition	Ducati magneto
Spark Advance	20' – 22' 1.6 – 2 mm before top dead center
Point Setting	.35-.45 mm
Carburetor	dell'orto SH 18/12
Choke	12mm
Slide	N/A
Needle	N/A
Atomiser	N/A
Main Jet	62
Pilot Jet	40
Starter	50
Float	3.5 Grams
Starter	Pedal
Crankcase oil	Agip Rotra SAE 90 360cc
Transmission Oil
Oil / Gas Mix	2%
Clutch	Multiple discs in oil bath
Gears	3 speed with hand shifter
1st	9/58 1: 6,44
2nd	15/53 1: 3,53
3rd	20/46 1: 2,30 – 38,3 kmh
Secondary Transmission	Simplex chain
Secondary Transmission
Frame	Monocoque frame of 1190mm
Front Suspension	Oscilating conecting rods
Rear Suspension	Torsion bar attached to motor with a single shock
Wheels	Dismountable wheels
Tires	3.00 x 10 pirelli or ceat
Tire Presure	Front 1.5 ATM, rear 1.75 ATM
Brakes	Drum
Dry Weight	78kg
Km Per Gallon	1.58lts per 100km
Fuel Capacity	6.2lt
Max Speed	40kmh
Initial Price	133,000 Italian Lira
Electrical System	6 volt
Sparkplug	Bosch 225 long thread
wheel Base	1190mm
Maximum Length	1660mm
Ground Clearance
Maximum Seat Hight
Minimum Turning Radius
Maximum Width	630mm
Maximum Hight	1020mm
Colour	Turquoise 8016
	Red 8073
	Ochre 8080