Modern Vespa

The rear shock I pulled out of the smallie is a Bitubo with a huge chunk of rubber on top. I have a new stockish Carbone on the shelf that doesn't have this huge block of rubber, but also doesn't have the extra rod on top that would allow me to put it on there. I'm just wondering if the metal cup on top can mount direct to the frame?

Looks like this:

That rubber is part of the mount so motor vibrations don't transfer to the frame/and also it would lower your bike in not a good way if you left it out.

You should be able to unscrew the rubber block from the old shock & use it on the new one if it's still in good shape.

just buy this .... if ya swappin the shock ya .....

I looked at it and now I see that if you increase the preload you get more rod for the rubber to sit on. It just wasn't obvious to me. Thanks.