The pill front end: Older karts used pills for camber adjustments, rather than heim joints. The kingpin went through a rectangular piece and the camber adjustment depended on where the hole was in the rectangular piece. So in your toolbox you had some pills.
The weight jacker: A bolt that can be used to adjust cross (and subsequently ride height and corner weight). Commonly on the left rear bearing cassette but I have seen these on the right rear or even front spindles (older karts).
The clamshell rearend: Most modern karts have clamshell style rear axle bearing cassettes that are two pieces and bolted together. This makes removing the rear end assembly for maintenance, repair, quick change-out, etc. much quicker and easier.
Y'all correct me if I'm wrong.
