How to port models to BeamNG

I want to start a modding project, but i dont know to to port models onto beamng
Link to model
https://grabcad.com/library/go-kart-3d-fully-complete
Please help

 

id recommend modelling one yourself, and scratch jbeaming it (which, ps: nobody will help you with, we have the wiki)
but if you can find a decent starting jbeam (i.e. that golf cart from 2013 or whatever) then this might help:
https://www.beamng.com/threads/tutorial-viewing-your-mesh-on-an-existing-vehicles-jbeam.41130/

 

you need to convert the model to .dae format, then apply a jbeam to it. If you can't figure out what to do from that information (as well as reading the wiki) then you're probably not cut out to port a whole car yet