Lambretta I 125 4m (Starstream)

  • I 125 4M

Lambretta I 125 4m (Starstream).

Technical Specification

Model I 125 4m
Amount Produced 16052
Production Dates May 1966 – April 1969
Frame Prefix j125
Engine Prefix J125-4
Frame Starting Number 150001
Engine Starting Number 150001
Homologation 3689 OM
Engine 122.5cc, two stroke, 57x58mm
Power and Rate 5.8hp at 5300rpm
Compression Ratio 1:7.45
Head and Cylinder Aluminium and cast iron
Engine Cooling Forced Air
Ignition Ducati magneto
Spark Advance 23' – 25' 2.4 – 2.8 mm before top dead center
Point Setting .35-.45 mm
Carburetor dell'orto SHB 18/16
Choke 16mm
Slide 6492/1
Needle N/A
Atomiser N/A
Main Jet 72
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 4 speed with hand shifter
1st 11/48 1: 4,36
2nd 14/44 1: 3,14
3rd 16/37 1: 2,31
4th 19/34 1: 1,79 – 67,9 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 1.3 ATM, rear 2 ATM
Brakes Drum
Dry Weight 9kg
Km Per Gallon 1.98lts per 100km
Fuel Capacity 6.2lt
Max Speed 87kmh
Initial Price 133.000 Italian Lira
Electrical System 6 volt
Sparkplug Bosch 240 long thread
wheel Base 1190mm
Maximum Length 1690mm
Ground Clearance
Maximum Seat Hight
Minimum Turning Radius
Maximum Width 630mm
Maximum Hight 1030mm
Colour Pastel Blue A 04T (suzuki)