Lambretta THINNER than original 2mm clutch top plate for series 1 2 3 models
2mm thickness to reduce clutch drag with some clutches. Along with a thinner 1.2 mm clutch steel plates set, this thinner top plate may help to reduce clutch drag issues with some clutch plate combinations.
INNOCENTI 19020018
NOTE: The original 2.5mm top plate was changed to 3mm in February 1969
See fig. 8 in the image below.