by steve c » Thu Jun 16, 2016 3:36 pm
the genuine sil ones are regarded as good, there is a thin early type for italian ser 1 2 and early three when innocenti thickened the boss at the back, but lambretta clutches have no clearance anyway and can rub the top clutch plate whatever, this all detailed in stickies lambretta manual,to use the post mod type the casing will need machining ( special tool or router based bodgery detailed somewhere on here) so you can get the circlip on, 4mm from memory from the inner face, The indian sil kickstarts are longer so may not need this, many people grind the heel behind the spring location to clear the clutch as well.The indians make li and gp types but check everything clears and buy carefully from a dealer who has stock he trusts,
Or you could take the part out and put a picture on the forum on here and people may be able to help. then order the correct italian one at much greater cost
spanish may different but I think they used the early type well into the seventies,but a Spaniard enthusiast will put me right
on the early type the splines are continuous where as the later type are rebaitted to take a bigger kickstart bolt