here is a quad bike that I generated from a photograph using meshy…

I have refined and repaired the mesh and it is solid.

warning…..  I used at least 50% infill for strength of the thin parts but the big gamble is how much support to use… too little and the model will collapse during printing or too much and it is really difficult to remove the supports….

I used tree (organic) support with 15% overhang thresh hold  and the support for one side of the handlebars collapsed but my printer recovered it… but man it was tedious removing the supports without destroying the model.

it is a gamble with 15% but you will regret it if you use more, when you come remove the supports….

it is a super model and if you have a colour printer it would look awesome!

here is a thought… you might find printing the model upside down could really save some support removing anguish… just a thought!