To answer your questions Gokarttimmy:
No, the bumpers do no appear to be factory. They would have had either a swoop like what you would see on other karts or none at all. There are aftermarket bumpers such as Burgfelt which are bolt on.
From what I have gathered by examining your photos, no the kart does not appear to be a Super K. Reasons are:
1. No sign of rear spun aluminum fuel tank mounts/brackets on the frame. These brackets would be located on each side of the frame post, behind the seat down at the bottom towards your tailbone.
2. The Super K does not have support bars on the front spindles.
3. The Super K was shorter in length for performance reasons then the other Rupp kart models
I actually have a Rupp Dart Kart "Super K" and is in the process of restoring it. Cool kart though, hope this clear things up.
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