The more stable 3rd gear for the late PACEMAKER transmission.
From July 1964, the Special 150 was fitted with a reinforced 3rd gear.
From frame number 94018, the Li 125 Series 3 also has the more stable Pacemaker gearbox.
The gear also fits as an upgrade for the earlier Pacemaker gearboxes. However, it cannot be combined with parts from other Lambretta gearboxes.
However, the closely stepped Pacemaker gearbox itself can be fitted to all engines in the Li family (LI, LIS, SX, TV (Series 2-3), DL, GP).