Are Kickstart Shafts Interchangeable?

[ToBoldlyGo]

Can you use a later S3 kickstart shaft in a S2 engine casing? I wondered if there might be any advantage in doing so?

[coaster]

The GP shaft is about 1 or 2mm shorter and requires the inside of the side case boss to be machined accordingly. It is possible yours has already been done though as this was a very common mod back in the day as Innocenti stopped supplying the old style (in the UK at least) around 1970.

[ToBoldlyGo]

Sorry for the laymans grasp of mechanics, but are you saying that basically you remove the corresponding 1 - 2mm from the inside of the casing so that the GP shaft will protrude more?

[rossclark]

So that the GP shaft will protrude ENOUGH to get the shim and circlip on.

Check for fit before removing any metal .

[ToBoldlyGo]

I've got you. Good advice.