I used to run a Vortex ROK TT and recall struggling to find a manual as well (granted this was a few years ago). I ended up calling a few places that either sold Vortex parts and/or rebuilt them and I was able to at least get answers to my specific questions even though they didn’t have manuals. I believe Comet Kart Sales and J3 Competition were who I contacted…
As far as the Kosmic kart goes I’m not much help. Comet Karts Sales sells the chassis line so they may be a good source of info (in addition to asking about the Vortex).
November 15-19, 2017
Las Vegas, Nevada
SKUSA SuperNationals 21
2018 Events TBA