Bobbing for XS's

[NESSMUK]

What are the heavy parts that can be bobbed off or swapped to lighter parts?
I'm wondering if there are aluminum swing arms or a triple tree that fits?
I've bobbed a couple bikes, but not one of these.

 

[jetmechmarty]

https://www.motolanna.com/ourshop/prod_448876-Swingarm-Aluminum-Alloy-SuperTuff.html

The XS650 has a steel seat pan and steel fenders.

 

[NESSMUK]

No options from the used parts market?