Lambretta kickstart spring

[onefortheroad]

I recently bought a s3 project that ended up having a s2 engine in it. I decided to buy an early s3 casing and transfer the internals from the s2, using this as a chance to build my first engine (after 12 years of owning 2 Vespas and 3 Lambrettas!)

All is going well and it's been a sharp learning curve with many jobs being done twice.

I have noticed that there is two types of kickstart spring (one for s2 and one for s3). What is the difference and why won't a s2 spring fit an early s3 side-casing?

[YAMLAM]

i think the difference is the diameter of the wire used, series 3 being thicker, so the location holes in the side case and kick start shaft are bigger to match.

[onefortheroad]

Cheers.

Is there any differences in the kickstart shafts?

I've put the s2 spring in with the s2 shaft and it seems to fit?

[HxPaul]

The series 2 shaft has uncut splines so an ordinary kickstart bolt wont fit.

[onefortheroad]

Cheers Paul