To comply with new Italian laws, the second series of the Lambretta Li, produced between 1959 and 1961, improved the stopping power of the foot brake pedal. Odometers were also made standard on both the 125cc and 150cc models.
A few mechanical improvements were made to the engine including modification of the piston, so it would start more easily when cold and limit wear and tear. With these small but significant changes, the Lambretta Li Series II could easily run on an oil-to-gas mixture of only two percent oil.
In 1960, the rear light was enlarged and made brighter, and the hooter was made louder (what Italian wouldn’t love that?) In 1961, the attachment of the air filter was simplified by mounting a double steel spring.
With more than 270 000 of the Lambretta LI Series II built, including 162 040 of the 150cc version, a new production record was set. The assembly line at Innocenti now put out 74 new scooters per hour.